Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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