Russell, Frederick A.
McGraw-Hill Publishing Company, 1988
Buku Teks
Golay, Frank H.
Cornell University, 1976
Buku Referensi
Eliot, George, author
Everyman's Library, 1993
Buku Teks
Farrel Eden Surbakti, author
Fakultas Hukum Universitas Indonesia , 2020
UI - Skripsi (Membership)
Phillips, Jerry J.
The Michie Company, 1994
Buku Teks