Goodpaster, Gary, author
Elips Project, 1993
Buku Teks
Goodpaster, Gary, author
Transnational pubblishers , 1997
Buku Teks
DeMarr, Beverly J., author
Pearson, 2014
Buku Teks
Crowley, Thomas E., 1948-, author
John Wiley & Sons, 1994
Buku Teks
Goodpaster, Gary, author
Elips Project, 1993
Buku Teks