Lopez, David, author
St. Paul Minn, 2000
Buku Teks
Spanogle, John A., author
St. Paul Minn, 2000
Buku Teks
Folsom, Ralph Haughwout, author
West Group, 1999
Buku Teks
Guruswamy, Laskshman, author
[Publisher not identified], 1994
Buku Teks
Kennedy, Robert, 1974-, author
Cambridge University Press, 2017
Buku Teks