Bose, Ashish, author
University of North Carolina Press, 1972
Buku Teks
Ford, Thomas R., author
Prentice-Hall, 1970
Buku Teks
Pressat, Roland, author
Methuen, 1978
Buku Teks
Barnes & Noble, 1971
Buku Teks
Caselli, Graziella, author
Elsevier, 2005
Buku Teks