Curran, Daniel J., author
Allyn & Bacon, 1987
Buku Teks
Mooney, Linda A., author
Wadsworth, Thomson Learning, 2000
Buku Teks
Moore, Robert
Routledge & Kegan Paul, 1982
Buku Teks
Cuber, John F
Henry Holt And Company, 1951
Buku Teks
Mooney, Linda A., author
Cengage Learning, 2017
Buku Teks