Digumarti Bhaskara Rao
Discovery Publishing House, 2001
Buku Teks
Digumarti Bhaskara Rao
Discovery , 2001
Buku Teks
Erika De Wet and Jure Vidmar, editors
Oxford university press, 2012
Buku Teks
Shelton, Dinah L., author
Edward Elgar, cop, 2014
Buku Teks
Gibson, John S., author
Praeger, 1991
Buku Teks