Delaet, Debra L., 1968-
Cengage Learning, 2015
Buku Teks
Lamchek, Jayson S.
Cambridge University Press, 2019
eBooks
Delaet, Debra L., 1968-
Thomson Wadsworth, 2006
Buku Teks
North-South Institute , 1993
Buku Teks
Martinus Nijhoff Publishers, 1995
Buku Teks