edited by Cyril M. Harris
McGraw-Hill, 1979
Buku Referensi
Fader, Bruce, author
John Wiley & Sons, 1981
Buku Teks
Benedict Giankana Rangkidompu Sowolino, author
Fakultas Hukum Universitas Indonesia, 2022
UI - Skripsi (Membership)
Duerden, C.
Philosophical Library, 1970
Buku Teks
Artikel Jurnal