All APA formatted documents use headings that show your readers how your paper is organized by labeling the parts and by indicating which parts are equally important and which are subordinate to others.

For a complete treatment of the politics of headings, take a look at the Publication Manual of the American Psychological Association, sixth edition (2010), pages 62-63.

• centered
• boldface
• uppercase and lowercase

text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text

## Level 1 and 2 Headings

Slightly more complex undergraduate papers often use Level 1 and Level 2 headings.

• flush left
• boldface
• uppercase and lowercase

text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text

## Level 1, 2, and 3 Headings

Papers that are long or that have many subsections often use Level 1, Level 2, and Level 3 headings.

• indented
• boldface
• sentence case (only 1st letter capitalized)
• followed by a period, and then immediately by text

Level three heading. text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text

## Level 1, 2, 3, and 4 Headings

Multiexperiment studies, monographs, and lengthy literature reviews often require Level 1, Level 2, Level 3, and Level 4 headings.

• indented
• boldface
• sentence case (only 1st letter capitalized)
• followed by a period, and then immediately by text

Level three heading. text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text

Level four heading. text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text

## Level 1, 2, 3, 4, and 5 Headings

Books often use Level 1, Level 2, Level 3, Level 4, and Level 5 headings.

• indented
• italicized
• sentence case (only 1st letter capitalized)
• followed by a period, and then immediately by text