Moscati, Sabatino
Routledge & Kegan Paul, 1960
Buku Teks
edited by Julia Annas
Clarendon Press , 1985
Buku Teks
editor, Frank R. Burden
McGraw-Hill, 2002
Buku Referensi
Widi Megantoro, author
Fakultas Hukum Universitas Indonesia, 2014
UI - Tesis Membership
Blackson, Thomas A., author
Wiley-Blackwell, 2011
Buku Teks