Nentl, Nancy J., author
McGraw-Hill/Irwin, 2003
Buku Teks
by Joseph Plummer [and others]
John Wiley & Sons, 2007
Buku Teks
Sandra L. Christenson, Amy L. Reschly, Cathy Wylie, editors
[Springer, ], 2012
eBooks
Google Inc., 2016
Buku Teks
Amy Yayuk Sri Rahayu, author
2013
Artikel Jurnal