Cita APA (7a ed.)

Nuttin, J. (1961). Psychology in Belgium. Publications Universitaires [etc.].

Cita Chicago Style (17a ed.)

Nuttin, Joseph. Psychology in Belgium. Louvain [etc.]: Publications Universitaires [etc.], 1961.

Cita MLA (9a ed.)

Nuttin, Joseph. Psychology in Belgium. Publications Universitaires [etc.], 1961.