McKenna, George
McGraw-Hill, 1998
Buku Teks
Herring, E. Pendleton
Norton, 1966
Buku Teks
by William J. Keefe ... [and others]
The Dorsey Press, 1983
Buku Teks SO
Kenneth Janda, Jeffrey M. Berry, Jerry Goldman, Deborah J. Schildkraut, Paul Manna
Cengage Learning, 2018
Buku Teks
Dye, Thomas R.
Thomson, 2006
Buku Teks SO