edited by Rebecca B. Rubin, Philip Palmgreen and Howard E. Sypher
Lawrence Erlbaum Associates, 2004
Buku Teks SO
edited by Valerine Manusov
Lawrence Erlbaum Associates, 2005
Buku Teks SO
John Wiley & Sons Inc, 1999
Buku Teks SO
compiled and edited by Samuel E. Krug
Metritech, 1993
Buku Referensi
Adams, Francis V.
McGraw-Hill, 2007
Buku Teks SO