Alderfer, E.B.
Economics of American industry
McGraw-Hill, 1950
 Buku Teks
Wilcox, Walter W.
Economics of American agriculture
Prentice-Hall, 1951
 Buku Teks
The economics of poverty : an American paradox
edited by Burton A. Weisbrod
Prentice-Hall, 1965
 Buku Teks
The economics of poverty : an American paradox
edited by Burton A. Weisbrod
Prentice-Hall, 1965
 Buku Teks
Greenstein, Fred I.
The American party system and the American people
Prentice-Hall, 1970
 Buku Teks SO