Leftwich, Richard H.
An introduction to economic thinking
Rienhard and Winston, 1969
 Buku Teks
Kohler, Heinz
Scarcity challenged : an introduction to economic
Holt, Rinehart and Winston, 1968
 Buku Teks
Robinson, Marshall A.
An introduction to economic reasoning
Brookings Institution, 1962
 Buku Teks
Robinson, Marshall A.
An introduction to economic reasoning
Brookings Institution, 1962
 Buku Teks
Stockton, John R.
Introduction to business and economic statistics
South Western, 1966
 Buku Teks SO