O`Hagan, Howard
Talonbooks, 1977
Buku Teks SO
Yalman, Nur
University of California, 1967
Buku Teks SO
Alfian
Gadjah Mada University Press, 1989
Buku Teks SO
Jeroen Martijn Ten Voorde
University of Indonesia, Faculty of Law, 2017
Artikel Jurnal
Greenwood, N.N.
Oxford Pergamon Press 1984,
Buku Referensi