Townsend, Harry
Foundations of business economics : markets and prices
Routledge , 1995
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Samuelson, Paul Anthony, 1915-2009
Economics
McGraw-Hill, 2010
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Lipsey, Richard G.
Economics
Harper Collin, 1996
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Albrecht, William P.
Economics
Prentice-Hall, 1979
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Adreson, W. H. Locke
Economics
Prentice Hall of India, 1986
 Buku Teks SO