APA (7th ed.) Zitazioa

Levitt, E. E. (1967). The psychology of anxiety (ed.). Bobbs-Merrill.

Chicago Style (17th ed.) Zitazioa

Levitt, Eugene E. The Psychology of Anxiety. ed. Indianapolis: Bobbs-Merrill, 1967.

MLA (9th ed.) Zitazioa

Levitt, Eugene E. The Psychology of Anxiety. ed. Bobbs-Merrill, 1967.