Publication manual of the American Psychological Association :  the official guide to APA style /  Textual Documents 
American Psychological Association . 
 - 7th ed. 
 - Washington:  American Psychological Association,  2020. 
 - xxii, 427 p.:  25 cm. 
<br/><br/><label>ISBN: </label>9781433832161 
<br/><br/><label>Dewey Class. No.: </label>808.06615