Grubel, Herbert G., author
Penguin Books, 1972
Buku Teks
Lowenfeld, Andreas F., author
Matthew Bender, 1984
Buku Teks
Friedland, Jerold A., author
Lexis, 2014
Buku Teks
Siti Hatikasari, author
Fakultas Hukum Universitas Indonesia, 2018
UI - Tesis Membership
Friedmann, Wolfgang, 1907-1972, author
Little, Brown, 1959
Buku Teks