Παραπομπή APA

Bittel, L. R. (1972). Nine master keys of management. McGraw Hill Book Co.

Παραπομπή Chicago Style

Bittel, Lester R. Nine Master Keys of Management. New York: McGraw Hill Book Co, 1972.

Παραπομπή MLA

Bittel, Lester R. Nine Master Keys of Management. McGraw Hill Book Co, 1972.