Riggs, Fred W., author
University of Hawaii, 1977
Buku Teks
Swerdlow, Irving
N.Y. Syracuse University Press , 1963
Buku Teks
Stein, Harold, author
Harcourt, Brace & World, 1952
Buku Teks
Washington, D.C. International Cooperation Administration s.a,
Buku Teks
Turner, Mark
Kumarian Press, Inc, 1997
Buku Teks