APA (7th ed.) Citation

Knapp, R. R. (1990). Handbook for the personal orientation inventory (2nd ed.). Edits Publishers.

Chicago Style (17th ed.) Citation

Knapp, Robert R. Handbook for the Personal Orientation Inventory. 2nd ed. San Diego, Calif.: Edits Publishers, 1990.

MLA (8th ed.) Citation

Knapp, Robert R. Handbook for the Personal Orientation Inventory. 2nd ed. Edits Publishers, 1990.