Chandos publishing, 2013
eBooks
edited by Jan Schildmann ... [and others]
Springer, 2012
eBooks
Tucker, Edwin W.
Irwin, 1992
Buku Teks
Brooks, Elizabert C
Jones & Bartlett Learning, 2013
Buku Teks SO
Guido, Ginny Wacker
Prentice-Hall, 2006
Buku Teks SO