edited by Ole Bruun and Arne Kalland
Surrey Curzon Press , 1996
Buku Teks
Neubeck, Kenneth J.
Mc Graw-Hill, 1996
Buku Teks
by Jacquelyn Sanders ... [and others]
The University of Chicago , 1968
Buku Teks
Konkle, Gail S.
Prindle, Weber & Schmidt, 1974
Buku Teks
Stephen Keck, author
ISEAS/BUFS, 2018
Artikel Jurnal