Wick, Robert J., author
Oxford University Press, 2007
Buku Teks
Neukrug, Edward S., author
Brooks/Cole Cengage Learning, 2012
Buku Teks
Zacharias, Eric, author
Springer, 2012
eBooks
Claringbull, Norman, author
Learning Matters, 2011
Buku Teks
Roberts, David L., 1973-, author
Oxford University Press, 2016
Buku Teks