Morgan, David, L., author
Sage, 2019
Buku Teks
edited Graham R. Walden
Sage, 2012
Buku Referensi
Johnson, David W., 1940-, author
Allyn and Bacon, 1997
Buku Teks
Johnson, David W., 1940-, author
Allyn and Bacon, 2000
Buku Teks
Johnson, David W., 1940-, author
Pearson Education, 2006
Buku Teks