Cita APA

Siwek, P., & Welsh, G. S. (1959). Experimental psychology.

Chicago Edition Citation

Siwek, Paul, i George Schlager Welsh. Experimental Psychology. 1959.

Cita MLA

Siwek, Paul, i George Schlager Welsh. Experimental Psychology. 1959.

Atenció: Aquestes cites poden no estar 100% correctes.