Searle, John R., author
MIT Press, 1998
Buku Teks
Alexander Moreira-Almeida, Franklin Santana Santos, editors
Springer, 2012
eBooks
Kim, Jaegwon, author
Westview Press, 2006
Buku Teks
Maslin, K.T.
Polity Press, 2007
Buku Teks
Brian Beakley; Peter Ludlow
MIT Press , 2006
Buku Teks