Gaya APA

Bittel, L., Newstrom, J, W. (1990). What Every Supervisor Should Know (Ed. 6). : Mc.Graw-Hill.

Gaya MLA

Bittel, Lester., Newstrom, John, W.. "What Every Supervisor Should Know". Ed. 6 : Mc.Graw-Hill, 1990. Text.