Morris, Jackson E., author
McGraw-Hill, 1966
Buku Teks
Donovan, Todd, author
Wadsworth and Cengage Learning, 2014
Buku Teks
Lewis, C.D., author
Butterworth, 1970
Buku Teks
Croarken, Mary, author
Clarendon Press, 1990
Buku Teks
Buchman, Joseph, author
Englewood Cliffs, NJ, Prentice-Hall
Buku Teks