Gaya APA

Bittel, L, R. (1985). Encyclopedia of professional management: volume 2 (Cetakan Kedua). United States Oof America: Grolier International.

Gaya MLA

Bittel, Lester, Robert. "Encyclopedia of professional management: volume 2". Cetakan Kedua United States Oof America: Grolier International, 1985. Text.