Rosenfeld, George W.
Routledge, Taylor & Francis Group, 2009
Buku Teks
Elwyn, Glyn
Oxford University Press, 2016
eBooks
Rubin, Allen
John Wiley & Sons, 2012
Buku Teks
Howlett, Bernadette
MA Jones Bartlett Learning, 2014
Buku Teks
Weisz, John R.
Cambridge University Press, 2004
Buku Teks