Παραπομπή APA

Heyel, C. (1962). Management for modern supervisions. American Management Association.

Παραπομπή Chicago Style

Heyel, Carl. Management for Modern Supervisions. U.S.A: American Management Association, 1962.

Παραπομπή MLA

Heyel, Carl. Management for Modern Supervisions. American Management Association, 1962.