Griffith, W. Thomas
McGraw-Hill, 2012
Buku Teks SO
Kirkpatrick, Larry D.
Brooks/Cole Cengage Learning, 2010
Buku Teks SO
Kitaigorodsky, A.
Foreign Languages, [Date of publication not identified]
Buku Teks SO
by John D. Cutnell ... [and others]
John Wiley & Sons, 2015
Buku Teks SO
Hewtt, Paul G.
Addison-Wesley, 1997
Buku Teks SO