Horton, Paul B., author
Erlangga, 1999
Buku Teks
Schaefer, Richard T, author
Salemba Empat, 2012
Buku Teks
edited by Alan Bryaman
Sage, 2001
Buku Referensi
Horton, Paul B., author
Erlangga , 1991
Buku Teks
Johnson, Doyle Paul, author
Gramedia Pustaka Utama, 1994
Buku Teks