Dillon, Patricia M., author
F.A Davis Company, 2003
Buku Teks
Soja, Edward W.
Blackwell Pub , 2000
Buku Teks
edited by Guillermo Aguilar Alvarez and W. Michael Reisman
Martinus Nijhoff, 2008
Buku Teks
Blackwell, 2003
eBooks
edited by Alison Pullen, Nancy Harding, Mary Phillips
Emerald, 2017
eBooks