McCaffrey, Stephen C., author
Thomson/West, 2009
Buku Teks
Cunningham, William P., author
McGraw-Hill, 2013
Buku Teks
Beder, Sharon, author
Earthscan, 2006
Buku Teks
May, James R, author
Cambridge University Press, 2014
eBooks
Bill Freedman, editor
Springer Reference, 2014
Buku Teks