APA (7th ed.) Zitazioa

Lewis, D. J. (1963). Scientific principles of psychology. Prentice - hall.

Chicago Style (17th ed.) Zitazioa

Lewis, Donald J. Scientific Principles of Psychology. New Jersey: Prentice - hall, 1963.

MLA (9th ed.) Zitazioa

Lewis, Donald J. Scientific Principles of Psychology. Prentice - hall, 1963.