O`Hagan, Howard
school-marm tree
Talonbooks, 1977
 Buku Teks SO
Yalman, Nur
Under the bo tree: studies in caste, kinship, and marriage in the interior of ceylon
University of California, 1967
 Buku Teks SO
Alfian
Muhammadiyah : the political behavior of a muslim modernist organization under Dutch colonialism
Gadjah Mada University Press, 1989
 Buku Teks SO
Jeroen Martijn Ten Voorde
The dutch penal code under review / Jeroen Martijn Ten Voorde
University of Indonesia, Faculty of Law, 2017
 Artikel Jurnal
Greenwood, N.N.
Chemistry of the elements/N.N. Greenwood and A. Earnshaw
Oxford Pergamon Press 1984,
 Buku Referensi