Παραπομπή APA

Towers, J. M. (1969). Role - playing for supervisors. Pergaman press.

Παραπομπή Chicago Style

Towers, J. Maxwell. Role - Playing for Supervisors. London: Pergaman press, 1969.

Παραπομπή MLA

Towers, J. Maxwell. Role - Playing for Supervisors. Pergaman press, 1969.