Gnanou, Yves, author
John Wiley & Sons Inc, 2008
Buku Teks
Hakkarainen, Minna, editor
Springer, 2012
eBooks
edited by Vikas Mittal
John Wiley & Sons, 2013
Buku Teks
William Andrew, 2013
eBooks
Jacqueline I. Kroschwitz, executive editor
Wiley, 1990
Buku Referensi