Artikel Jurnal
Bagchi, S. N.
Wiley Eastern, 1979
Buku Teks
edited by Colin J. Smithells and assistant editor, Eric A. Brandes
Butterworth, 1976
Buku Teks
edited by Edward H. Smith
Butterworth-Heinemann, 1995
Buku Teks
edited by Dennis A. Snow
Butterworth-Heinemann, 1993
Buku Teks