Masselink, Gerhard
Hodder Education, 2011
Buku Teks
Haslett, Simon K.
Routledge, 2009
Buku Teks
Subramanian, V., editor
Springer, 2012
eBooks
Black, John A.
Wm.C. Brown Publishers, 1986
Buku Teks
Beatley, Timothy
University California Press, 2003
Buku Teks