David Collier, John Gerring, editor
Routledge, 2009
Buku Teks
Dayf, Shawqi
ISESCO , 1998
Buku Teks
Barbour, Andrew D., editor
[Springer, ], 2012
eBooks
Wong, Roderick, 1944-
Society for Industrial and Applied Mathematics, 2001
eBooks
Daillant, Georges
International Universities Bureau of the International Association of Universities, 1990
Buku Referensi