Wedia Hidayana
Dinas pendidikan Kota Padangpanjang, 2014
Artikel Jurnal
editors, Linda Miller, Carmen Dalli, Mathias Urban
Springer, 2012
eBooks
edited by Nicola Yelland
Open University Press, 2005
Buku Teks
Nini Hidayati Jusuf, author
1992
UI - Tesis (Membership)
Roopnarine, Jaipaul L., author
kencana Prenada Media Group, 2011
Buku Teks