Picado, Jorge, author
Springer, 2012
eBooks
Steinbach, Alice, author
Transworld , 2001
Buku Teks
Whyte, Ian, author
I.B. Tauris, 2008
Buku Teks
Hare, Robert D., author
The Guilford Press, 1999
Buku Teks
Putnam, Tonya L. (Tonya Lee), author
Cambridge University Press, 2016
Buku Teks