Newman, William H., author
Prentice-Hall of Japan, 1963
Buku Teks
DeGreene, Kenyon B., author
John Wiley, 1982
Buku Teks
Seckler-Hudson, Catheryn, author
Washington, D.C., The American University Press
Buku Teks
Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1945
Buku Teks
by James L. Riggs ... [et al.]
McGraw-Hill, 1979
Buku Teks