Golding, E.W., author
Pitman Paperbacks, 1970
Buku Teks
Robertson, Christopher R., author
Edward Arnold, 1993
Buku Teks
Pillai, S.K., author
Wiley Eastern, 1985
Buku Teks
Braccio, Michael
Reston Publishing Company, Inc., 1978
Buku Teks
Jones, Larry D.
John Wiley & Sons, 1983
Buku Teks