Cascarino, Richard, author
John Wiley & Sons, 2007
Buku Teks
Cascarino, Richard E., author
John Wiley & Sons, 2012
Buku Teks
Cannon, David L., author
Wiley publishing, inc., 2011
Buku Teks
Nyirongo, Abraham, author
Trafford, 2015
Buku Teks
Scott, Richard A., 1935-, author
Reston Publishing, 1982
Buku Teks