edited by Andrew Gyorgy and Hubert S. Gibbs
Prentice-Hall, 1955
Buku Teks
Deutsch, Karl Wolfgang, 1912-1992, author
Prentice-Hall, 1988
Buku Teks
Routledge, 1997
Buku Teks
Reynolds, P.A., author
Longman, 1994
Buku Teks
edited by William T.R. Fox
Indiana University of Notre Dame Press , 1959
Buku Teks