Wright, Vincent
New York Holmes [t.th.]
Buku Teks
Taylor, George E.
New York Institute of Pasific Relations 1940
Buku Teks
Haga, B. J.
Buku Teks
Australian : Bridge Printery Pty
Majalah, Jurnal, Buletin
Chicago : University of Chicago Press
Majalah, Jurnal, Buletin