Colyvan, Mark
Cambridge University Press, 2012
Buku Teks
Oxford University Press, 1998
Buku Teks
Anglin, W.S.
Springer-Verlag, 1994
Buku Teks
Prihatin Muslim
Universitas Indonesia, 1989
UI - Skripsi (Membership)
Omnes, Roland
Princeton University Press , 1999
Buku Teks