Huberty, Thomas J.
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
Cecilia A Essau, Franz Petermann, editor
Taylor & Francis Inc, 2001
Buku Teks