Colombo Plan Bureau
Colombo Plan Bureau, 1960
Buku Teks
Menefee, Selden Cowles, 1909-
Reynal and Hitchcock, 1943
Buku Teks
Burkard, Rainer
Society for Industrial and Applied Mathematics, 2009
eBooks
F.X. Widiarso
2000
UI - Skripsi Membership
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2004
UI - Tesis Membership