Hayes, Carlton J. H.
Macmillan,
Buku Teks
White, James L.
Washington Square Press, 1966
Buku Teks
Hazen, Charles Downer
Buku Teks
Gallagher, Michael
McGraw-Hill, 2011
Buku Teks
edited by Norman F. Cantor and Samuel Berner
Thomas Y. Crowell, 1970
Buku Teks