Roosevelt, Theodore, author
Prentice-Hall, 1961
Buku Teks
Evera, Stephen van, author
[publisher not identified], [date of publication not identified]
Buku Teks
Solberg, Carle
Stanford University Press, 1979
Buku Teks
Christie, Clive J., author
Institute of Southeast Asian Studies , 1996
Buku Teks
Romein, Jan, author
University of California Press, 1962
Buku Teks