Anderson, Leonard R.,
Reston Publishing, 1981
Buku Teks
Kosow, Irving L.
Prentice-Hall, 991
Buku Teks
Gingrich, Harold W.
Prentice-Hall, 1979
Buku Teks
Say, M.G.
Longman, 1992
Buku Teks
Kostenko, M. P. (Mikhail Polievktovich), 1889-1976
Peace Publishers,
Buku Teks