edited by K. Anders, Neil Charness
Cambridge University Press, 2006
Buku Teks SO
Barry J. Zimmerman, Dale H. Schunk, editor
Routledge, 2011
Buku Teks
editors, C. Merle Johnson, William K. Redmon, Thomas C. Mawhinney
Murai Kencana, 2005
Buku Teks
edited by David R. Martinez, Robert A. Bond, M. Michael Vai
CRC Press, 2008
Buku Referensi
Gupta, Praveen
MCGraw-Hill, 2004
Buku Teks