Burns, Danny, 1964-
Macmillan, 1994
Buku Teks
Irish, Marian D.
Prentice-Hall, 1962
Buku Teks
Woll, Peter
Little, Brown, 1982
Buku Teks
Caprara, Gian Vittorio
Oxford University Press, 2016
eBooks
by William J. Keefe ... [and others]
The Dorsey Press, 1983
Buku Teks