Carroll, Quinn B., author
Delmar, Cengage Learning, 2014
Buku Teks
Moore, Brooke Noel, author
McGraw-Hill, 2004
Buku Teks
Moore, Brookee Noel, author
McGraw-Hill, 2015
Buku Teks
edited by H.S.D. Cole ... [et. al.]
Chatto & Windus for Sussex University Press, 1973
Buku Teks
Brudney, Kent M., author
Thomson, 2003
Buku Teks