Artikel Jurnal
Byrne, Brian, author
Psychology Press, 1998
Buku Teks
edited by Jessica Williams and Bill Van Patten
NY : Routledge, 2015
Buku Teks
Edited by Alison Mackey, Dudan M. Gass
Wiley-Blackwell, 2012
Buku Teks
Berwick, Robert C.
MIT Press, 1984
Buku Teks