Gaya APA

Douglas, E, J., Callan, S. (1992). Managerial economics : analysis and strategy (4th.ed.). New Jersey: Prentice Hall.

Gaya MLA

Douglas, Evan, J.., Callan, Scott. "Managerial economics : analysis and strategy". 4th.ed. New Jersey: Prentice Hall, 1992. Text.