edited by Michael Tomasello
Lawrence Erlbaum Associates, 2003
Buku Teks
Nickels, Lyndsey
Psycology press, 1997.
Buku Teks
Cambridge University Press, 2007
eBooks
Mathiot, Madeleine
Indiana University, 1968
Buku Teks
Caplan, David, author
MIT Press, 1993
Buku Teks