Lawrence Erlbaum, 2004
Buku Teks
edited by Rebecca B. Rubin, Philip Palmgreen and Howard E. Sypher
Lawrence Erlbaum Associates, 2004
Buku Teks
Miller, Katherine
McGraw-Hill, 2005
Buku Teks
Zulfikar Mochamad Rachman, Joko Widyanto, editor; Riza Irfani, editor
UNDP, 2007
Buku Teks
Edelstein, Alek S.
Sage, 1982
Buku Teks SO