Smith, Mickey A., author
The Williams and Wilkins, 1976
Buku Teks
Binns, Colin, author
University of Malaya Press, 2009
Buku Teks
edited by Daniel W. Harrington, Sara McLafferty and Susan J. Elliott
Routledge, Taylor and Francis Group, 2017
Buku Teks
Feldstein, Paul J., author
Delmar, 1993
Buku Teks
Fuchs, Victor R.
Basic Books, 1974
Buku Teks