Winchester, A.M., author
Hoghton Mifflin, 1959
Buku Teks
Cummings, Michael R., author
Brooks/Cole, Cengage Learning, 2011
Buku Teks
Snyder, Laurence H., author
Heath, 1957
Buku Teks
Montagu, Ashley, 1905-1999, author
Word Publishing, 1995
Buku Teks
James J. Nora [and others]
Lea & Febiger , 1993
Buku Teks