McKenna, John R.
Readings in introductory economics/ John R. McKenna and Ronald A. Wykstra
Harper and Row , 1971
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Samuelson, Paul Anthony, 1915-2009
Economics an introductory analysis
McGraw-Hill, 1985
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Samuelson, Paul Anthony, 1915-2009
Economics an introductory analysis
McGraw-Hill, 1958
 Buku Teks
Samuelson, Paul Anthony, 1915-2009
Economics an introductory analysis
McGraw-Hill, 1964
 Buku Teks
Samuelson, Paul Anthony, 1915-2009
Economics an introductory analysis
McGraw-Hill, 1961
 Buku Teks