CAMBRIDGE UNIVERSITY PRESS,
Majalah, Jurnal, Buletin
Sibley, Rob
Stanley Thornes , 1994
Buku Teks
edited by Meredith Wallace Kazer
Wiley-Blackwell, 2012
Buku Teks
compiled by Roxy Peck, Larry D. Haugh, Arnold Goodman
Society for Industrial and Applied Mathematics, 1998
eBooks
editors, Roxy Peck, Larry D. Haugh, Arnold Goodman
Society for Industrial and Applied Mathematics, 1998
eBooks