Ropper, Allan H.
McGraw-Hill, 2014
Buku Teks
Syarifah Nur, author
Fakultas Hukum Universitas Indonesia, 1993
UI - Skripsi (Membership)
Garst, Jonathan
Random House, 1963
Buku Teks
Harris, Jonathan
Jakarta s.n. 1995,
Buku Teks
Gems, Jonathan
A Signet Book, 1996
Buku Teks