Stoever, William A., author
Lexington Books, 1981
Buku Teks
Leathley, Christian, author
Kluwer, 2007
Buku Teks
Nehr, Lee Charles, author
International Textbook, 1967
Buku Teks
Nehr, Lee Charles, author
Intext Educational, 1972
Buku Teks
Folsom, Ralph Haughwout, author
St. Paul, Minn, 1995
Buku Teks