edited by Naoki Yoshihara
Trans Pacific Press, 2012
Buku Teks SO
Cambridge University Press, 1990
Buku Teks
edited by Reginald T. Appleyard
University of Western Australia, Centre for Migration and Development Studies, 1988
Buku Teks SO
Appleyard, Reginald T.
IOM, 1991
Buku Teks SO
Castles, Stephen
Macmillan, 1993
Buku Teks SO