editor, Abdul Malik, Elisabeth Grohmann
Springer, 2012
eBooks
Das, Onita
Edward Elgar, 2013
Buku Teks
Barrow, Christopher J.
Routledge, 2006
Buku Teks
Hackett, Steven C.
M.E. Sharpe, 2001
Buku Teks SO
edited by Marie D. Hoff and John G. McNutt
Avebury, 1994
Buku Teks SO