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