Gaya APA

Dolan, E, G., Lindsey, D, E. (1988). Ecinomics-- (5th.ed.). Chicago: The Dryden Press.

Gaya MLA

Dolan, Edwin, G.., Lindsey, David, E.. "Ecinomics--". 5th.ed. Chicago: The Dryden Press, 1988. Text.