Kessler, Gunter, author
[Springer, ], 2012
eBooks
edited by Alan Bryman & Robert G. Burgess
Sage, 1999
Buku Teks
National University of Singapore, [date of publication not identified]
Buku Referensi
National University of Singapore, 1997
Buku Teks
National University of Singapore, [date of publication not identified]
Buku Referensi