By Guillaume, Paul.
Buenos Aires Editorial Psique 1971 , Translation of : La psychologie de la forme.

By Guillaume, Paul.
Chicago University of Chicago Press 1971 .
xvii, 214 p. , Translation of L'Imitation chez l'enfant. 21 cm..
0226310450

By Guillaume, Paul.
Buenos Aires Editorial Psique 1973 .
233 p. , Translation of: La psychologie animale. 20 cm..