Ulmer, Melville J.
Economics theory and practice
Houghton Miffiln, 1959
 Buku Teks
Colander, David C.
Economics / David C. Colander
McGraw-Hill, 2004
 Buku Teks
Carson, Richard L.
Comparative econnomic systems
Macmillan, 1973
 Buku Teks
Frain, H. LaRue
An introduction to economics / by H. LaRue Frain
Hougton Mifflin Company, 1937
 Buku Teks
Blaug, Mark
Economic theory in retrospect
Cambridge University Press, 1987
 Buku Teks