Παραπομπή APA

Bittel, L. R. (1978). Encyclopedia of professional management. McGraw-Hill.

Παραπομπή Chicago Style

Bittel, Lester Robert. Encyclopedia of Professional Management. New York: McGraw-Hill, 1978.

Παραπομπή MLA

Bittel, Lester Robert. Encyclopedia of Professional Management. McGraw-Hill, 1978.