Isaacs, Asher, 1902-1963, author
Dryden Press, 1952
Buku Teks
Abbott, Lawrence, author
Harcourt, Brace and World, 1967
Buku Teks
Daughterty, Caroll R., author
Houghton Mifflin, 1950
Buku Teks
Lindauer, John, author
Saunders , 1977
Buku Teks
Frieden, Jeffry A., author
Thomson Wadsworth, 2000
Buku Teks