edited by Rebecca B. Rubin, Philip Palmgreen and Howard E. Sypher
Lawrence Erlbaum Associates, 2004
Buku Teks
Wimmer, Roger D.
Wadsworth, 1987
Buku Teks
Lawrence R. Frey...[et al.]
Prentice-Hall, 1991
Buku Teks SO
Edelstein, Alek S.
Sage, 1982
Buku Teks SO
Rubin, Rebecca B.
Wadsworth, 1999
Buku Teks SO