Soward, F.H., author
Manhattan Publishing Company, 1956
Buku Teks
Goodrich, Leland M., author
Thomas Y. Crowell, 1961
Buku Teks
United Nations, 1971
Buku Teks
Wright, Quincy, author
Asia Publishing House, 1960
Buku Teks
Coyle, David Cushman, 1887-1969, author
Columbia University Press, 1963
Buku Teks