Dubin, Steven C., author
Routledge, 1992
Buku Teks
Kawasaki, Guy, author
Portfolio/Penguin, 2011
Buku Teks
Pawakapan, Phuangthong R., author
Institute of South East Asia Studies, 2013
eBooks
Smitherman, Colleen, author
F.A. Davis company, 1981
Buku Teks
Tedeschi, James T., author
American Psychological Association , 1994
Buku Teks