Szuchman, Lenore T., author
Wadsworth, 2014
Buku Teks
Campbell, William Giles, author
Houghton Mifflin, 1967
Buku Teks
general editor, Philip Rubens
Henry Holt and Company, 1992
Buku Referensi
Eastman, Richard M.
Buku Teks
by Geraldine Henze
Richard D. Irwin, 1984
Buku Teks