Gaya APA

Ramsey, J, E., Bittel, L, R. (1985). Encyclopedia of professional management second edition volume 1 (-). United States of Amerika: Grolier International.

Gaya MLA

Ramsey, Jackson, Eugene., Bittel, Lester, Robert. "Encyclopedia of professional management second edition volume 1". - United States of Amerika: Grolier International, 1985. UMUM.