Center a level 1 heading in APA style. Use boldface text in title case (uppercase and lowercase) for your level 1 heading. Do not place a period after a level 1 heading in APA style.
Begin a level 2 heading flush left, or against the left margin of your text in APA style. Use boldface text in title case for your level 2 heading. Do not place a period after a level 2 heading in APA style.
Indent a level 3 heading in APA style with your tab button. Use boldface text in sentence case followed by a period. Sentence case means you should capitalize only the first word of the heading and any proper nouns such as the name of a person or place.
Indent a level 4 heading in APA style using your tab button. Use boldface and italicized text in sentence case followed by a period.
Indent a level 5 heading in APA style using your tab button. Italicize your level 5 heading, but do not use boldface. Use sentence case followed by a period.