Forsythe, David P., 1941-, author
University of Nebraska Press, 1983
Buku Teks
editor, Jonathan M. Mann
Routledge, 1999
Buku Teks
United Nations High Commissioner for Refugees, 2006
Buku Teks
Nickel, James W., author
Blackwell , 2007
Buku Teks
Reginald Appleyard
International Organization for Migration, 2001
Buku Teks