University of Texas Press,
Majalah, Jurnal, Buletin
edited by David Baker and Wendy Evans
Emerald, 2017
eBooks
Kwanya, Tom, author
Chandos, 2015
eBooks
Stern, David, author
Chandos, 2013
eBooks
Sanjay Kataria; B.S. Nigam; Rama Kant Shukla, editor
KBD Publications, 2009
Buku Teks