Gaya APA

Amacher, R, C., ulbrich, H, H. (1986). Principles of microeconomics ed. 3 . New York: South- Western Publishing Co.

Gaya MLA

Amacher, Ryan, C.., ulbrich, Holley, H.. "Principles of microeconomics ed. 3". New York: South- Western Publishing Co, 1986. Text.