Schechter, David, author
Virginia Publishing, 1982
Buku Teks
Noll, Paul, author
Mike Murach & Associates, Inc, 1978
Buku Teks
Nickerson, Robert C., author
Little, Brown, 1984
Buku Teks
Litecky, Charles R., author
McGraw-Hill, 1987
Buku Teks
Brown, Gary D., author
John Wiley & Sons, 1977
Buku Teks