Nelson, Grant S., author
West Publishing, 1992
Buku Teks
Axelrod, Alan, author
Little, Brown, 1970
Buku Teks
Brueggeman, William B., author
McGraw-Hill Irwin, 2011
Buku Teks
Glickman, Edward A., author
Academic Press, 2014
eBooks
Brueggeman, William B., author
Richard D. Irwin, 1997
Buku Teks