Krell, David Farrell, author
State University of New York Press, 1997
Buku Teks
editor, Brian A. Whitton
Springer, 2012
eBooks
Fell, Barry, author
Harper and Row, 1974
Buku Teks
Evett, Arthur, author
Publishers Creative Services, 1982
Buku Teks
Mills, Robert, author
W.H. Freeman, 1994
Buku Teks