Chemstations, 2001
Buku Teks
Dashefsky, H.S., author
Burgess, 1977
Buku Teks
EBSCOhost,
Multimedia
Briggs, William L., author
Society for Industrial and Applied Mathematics, 2000
eBooks
edited by W. Bardsley, D.T.J. Hurle, J.B. Mullin
North-Holland , 1979
Buku Teks