Goetsch, David L., author
Pearson-Prentice Hall, 2005
Buku Teks
Brauer, Roger L., author
Wiley, cop, 2016
Buku Teks
Barrett, Brenda, author
M&E Handbook Series, 1995
Buku Teks
Friend, Mark A., author
Bernan Press, 2014
Buku Teks
CCH Australia , 2001
Buku Teks