APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.