Gaya APA

Bittel, L, R., Newstrom, J, W. (1990). What every supervisor should know (6th. ed.). New York: Gregg Division, McGraw-Hill Pub..

Gaya MLA

Bittel, Lester, R., Newstrom, John, W. "What every supervisor should know". 6th. ed. New York: Gregg Division, McGraw-Hill Pub., 1990. Text.