Storr, Merl
Routledge, 1999
Buku Teks
M.Paz. Galupo
Routledge, 2009
Buku Teks
edited by Valentine Cunningham
West Sussex Wiley Blackwell, 2014
Buku Teks
editors, Andrew Azzopardi, Shaun Grech
Sense, 2012
eBooks
edited by John L. Bradley and Martin Stevens
Rinehart and Winston, 1968
Buku Teks