Cita APA (7th ed.)
Walraven, M. G. (1991). Psychology: Annual editions (21st ed.). Dushkin puplishing group.
Cita Chicago (17th ed.)
Walraven, Michael G. Psychology: Annual Editions. 21st ed. America: Dushkin puplishing group, 1991.
Cita MLA (9th ed.)
Walraven, Michael G. Psychology: Annual Editions. 21st ed. Dushkin puplishing group, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.