Anderson, Leonard R.
Reston Publishing, 1981
Buku Teks SO
Gingrich, Harold W.
Prentice-Hall, 1979
Buku Teks SO
Kosow, Irving L.
Prentice-Hall, 1991
Buku Teks SO
Kostenko, M.P. [Mikhail Polievktovich], 1889-1976
Peace Publishers,
Buku Teks SO
Say, M.G.
Longman, 1992
Buku Teks SO