AMACHER, R. C. (1986). Princeples Of Microeconomics Ryan C. Amacher And Holley H. Ulbrich. South-Western Publishing CO.
Lua i Stíl Chicago (17ú heag.)AMACHER, Ryan C. Princeples Of Microeconomics Ryan C. Amacher And Holley H. Ulbrich. South-Western Publishing CO, 1986.
Lua MLA (8ú heag.)AMACHER, Ryan C. Princeples Of Microeconomics Ryan C. Amacher And Holley H. Ulbrich. South-Western Publishing CO, 1986.
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