Veeraraghavan, Vimala, author
Sage, 2002
Buku Teks
Huberty, Thomas J., author
Springer, 2012
eBooks
Gavin Andrews, Mark Creamer, Rocco Crino, Caroline Hunt, Lisa Lampe, Andrew Page
Cambridge University Press, 2003
Buku Referensi
edited by Robert T. Woods
John Wiley & Sons, 1999
Buku Teks
Paris Goodyear-Brown, editor
John Wiley & Sons, 2012
Buku Teks