Crusius, Timothy W., author
McGraw-Hill, 2002
Buku Teks
Rottenberg, Annette T.
St. Martin, 1988
Buku Teks
Stanford University Press, 1993
Buku Teks
edited by George J. McCall, J.L. Simmons.
Random House, 1969
Buku Teks
Lanman, Charles Rockwell, 1850-1941, author
Harvard University Press, 1947
Buku Teks