Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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