APA (7th ed.) Citation

American Psychological Association. (1948). Directory of the American Psychological Association. Harris.

Chicago Style (17th ed.) Citation

American Psychological Association. Directory of the American Psychological Association. Purchase, NY: Harris, 1948.

MLA (9th ed.) Citation

American Psychological Association. Directory of the American Psychological Association. Harris, 1948.

Warning: These citations may not always be 100% accurate.