Gaya APA

Douglas, E, J. (1995). Managerial economics Analysis and Strategy Fouth Edition (Ke-4). Singapore: Prentice-Hall Internasional, Inc..

Gaya MLA

Douglas, Evan, J. "Managerial economics Analysis and Strategy Fouth Edition". Ke-4 Singapore: Prentice-Hall Internasional, Inc., 1995. Text.