Gaya APA

Amacher, R, C., Ulbrich, H, H. (1986). Principles Of Macroeconomics (Third Edition). Cincinnati: South-Western Publishing CO..

Gaya MLA

Amacher, Ryan, C.., Ulbrich, Holley, H.. "Principles Of Macroeconomics". Third Edition Cincinnati: South-Western Publishing CO., 1986. Text.