Irish, Marian D.
Prentice-Hall, 1962
Buku Teks SO
by William J. Keefe ... [and others]
The Dorsey Press, 1983
Buku Teks SO
McKenna, George
McGraw-Hill, 1998
Buku Teks SO
Kenneth Janda, Jeffrey M. Berry, Jerry Goldman, Deborah J. Schildkraut, Paul Manna
Cengage Learning, 2018
Buku Teks SO
Dye, Thomas R.
Harcourt Brace College, 2000
Buku Teks SO