Harold W. Baillie, John McGeehan, Thomas M. Garrett, Rosellen M. Garrett
Pearson, 2013
Buku Teks
Hall, George M.
Warren H. Green, 1992
Buku Teks
Duncan, Peter
Sage, 2014
Buku Teks
edited by Michael Parker
Routledge , 1999
Buku Teks
Editor: Souzy Dracopoulou
Routledge, 1998
Buku Teks