Griswold, Alfred Whitney, 1906-1963, author
Brace, 1939
Buku Teks
Moo,Harriet L
Princeton University press, 1945
Buku Teks
Clyde, Paul H. (Paul Hibbert), author
Prentice-Hall, 1948
Buku Teks
Bisson, T.A., author
International Secretariat Institute of Pasific Realtions , 1945
Buku Teks
Moore, Harriet
Princeton University Press, 1945
Buku Teks