Gass, Saul I.
Mc Graw Hill, 1975
Buku Teks SO
Gass, Saul I.
McGraw-Hill, 1985
Buku Teks SO
Schrijver, Alexander
John Wiley & Sons, Inc, 1986
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