Cambridge University Press, 2017
eBooks
Sartoni Zein
Fakultas Hukum Universitas Indonesia, 1983
UI - Skripsi Membership
Diah Karina Puspitawati
Fakultas Hukum Universitas Indonesia, 2003
UI - Skripsi Membership
edited by Amrei Muller, Hege Elisabeth Kjos
Cambridge University Press, 2017
Buku Teks SO
Artikel Jurnal