Wright, Philip G.
Institute of Pacific Relations, 1933
Buku Teks
Wright, Philip G.
The University of Chicago Press, 1931
Buku Teks
Gupta, K.R., author
S. Chand, 1967
Buku Teks
Crosby, Philip B., author
McGraw-Hill, 1979
Buku Teks
edited by Leslie V. Castle, Christopher Findlay
Allen & Unwin, 1988
Buku Referensi