Παραπομπή APA

Walley, B. (1975). Managment services hand book. Business books.

Παραπομπή Chicago Style

Walley, B.H. Managment Services Hand Book. New York: Business books, 1975.

Παραπομπή MLA

Walley, B.H. Managment Services Hand Book. Business books, 1975.