Campbell, George L., author
Routledge, 1998
Buku Teks
edited by William N. Locke and A. Donald Booth
MIT Press, 1965
Buku Teks
Kennedy, Dora, author
National Texbook, 1994
Buku Teks
Psychology Press , 1999
Buku Teks
Whorf, Benjamin Lee
John Wiley & Sons, 1956
Buku Teks