Gass, Saul I.
Mc Graw Hill, 1975
Buku Teks SO
Swanson, Leonard W.
Mc Graw Hill, 1980
Buku Teks SO
An-Min, Chung
Charles E. Merill Publishing CO., [;1963;1963, 1963]
Buku Teks SO
Djati Kerami
Universitas Terbuka, 2008
Buku Teks SO
Hadley, George, 1930-
Addison-Wesley, 1962
Buku Teks SO