Eisman, Louis, author
Prentice-Hall, 1964
Buku Teks
Boardman, Harry, author
Voice of America, 1974
Buku Teks
edited by Amos Rapoport
Angus and Robertson , 1972
Buku Teks
Greenwood, Ned H., author
Duxbury Press, 1979
Buku Teks
Ewert, Alan W., 1949-, author.
CABI, 2014
Buku Teks