Artikel Jurnal
Du Bois, Cora Alice, 1903-1991, author
University of Minesota Press, 1949
Buku Teks
edited by Kusuma Snitwongsa and W. Scott Thompson
ISEAS, 2005
Buku Teks
Swearer, Donald K., author
State University of New York Press, 1995
Buku Teks
edited by George McTurnan Kahin
Cornell University Press, 1969
Buku Teks