APA aipamena

International Congress of Applied Psychology Liège, International Association of Applied Psychology, & Piret, R. (1972). Actes. Proceedings. Editest.

Chicago Style aipamena

International Congress of Applied Psychology Liège, International Association of Applied Psychology, and Roger Piret. Actes. Proceedings. Bruxelles: Editest, 1972.

MLA aipamena

International Congress of Applied Psychology Liège, et al. Actes. Proceedings. Editest, 1972.