edited by Mel Schwartz
John Wiley and Sons, 2002
Buku Referensi
John Wiley and Sons, 2002
Buku Referensi
Timings, R.L. (Roger Leslie), 1927-, author
Longman Scientific, 1989
Buku Teks
Kluwer Academic Publishers, 1995,
Buku Referensi
edited by R.N. Swamy
Survey University Press, 1983
Buku Teks