Gaya APA

Bittel, L, R., Ramsey, J, E. (1989). ENCYCLOPEDIA OF PROFESSIONAL MANAGEMENT, Second Edition (Volume 1). USA: mcgraw hill.

Gaya MLA

Bittel, Lester, Robert., Ramsey, Jackson, Eugene. "ENCYCLOPEDIA OF PROFESSIONAL MANAGEMENT, Second Edition". Volume 1 USA: mcgraw hill, 1989. Text.