Gaya APA

Bittel, L, R., Newstrom, J, W. (1990). What Every Supervisor Should Know 6th Edition . New York: McGraw-Hill Book Company.

Gaya MLA

Bittel, Lester, R.., Newstrom, John, W.. "What Every Supervisor Should Know 6th Edition". New York: McGraw-Hill Book Company, 1990. Text.