Hague, Douglas C.
The essential of economics: an introduction and outline for students and for the general readers
Longmans, Green, 1955
 Buku Teks SO
Chang, Raymond
General chemistry : the essential concepts/ Raymond Chang
McGraw-Hill, 2014
 Buku Teks SO
Wensinck, A.J.
Tree and bird as cosmological symbolis in Western Asia
Johannes Muller, 1921
 Buku Teks SO
Dalilul Falihin
Pemikiran kosmologi Ibn' Arabi cosmological thought of Ibn 'Arabi
Program Pascasarjana Universitas Indonesia, 2004
 UI - Tesis Membership
Ehrlich, Robert
The cosmological milk shake : a semi-serious look at the size of things
Rutgers University, 1993
 Buku Teks SO