Psychologie et éducation ...
[par] Joseph Leif [et] Jean Delay.

APA Citation

Leif, J., Delay, J. (1965). Psychologie et éducation ..: [par] Joseph Leif [et] Jean Delay. [Paris]: F. Nathan.

MLA Citation

Leif, Joseph, and Jean Delay. Psychologie Et éducation ..: [par] Joseph Leif [et] Jean Delay. [Paris]: F. Nathan, 1965.

Warning: These citations may not always be complete (especially for serials).