edited by Michael Tomasello
Lawrence Erlbaum Associates, 2003
Buku Teks
Lambert, Wallace E., author
Stanford University press, 1972
Buku Teks
edited by Howard Giles and W. Peter Robinson
John Wiley & Sons, 1990
Buku Referensi
Devito, Joseph A., author
Random House, 1970
Buku Teks
Caplan, David, author
MIT Press, 1993
Buku Teks