Barker, Stephen, author
Pearson, 2012
Buku Teks
Newlen, Robert R., author
Neal-Schuman Publishers, 2006
Buku Teks
Curzon, Susan Carol, author
Facet Publishing, 2006
Buku Teks
Ross, Peter K., author
Emerald, 2017
eBooks
Auger B.Y.
McGraw-Hill, 1987
Buku Teks