Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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