Searle, John R.
A Member of the Perseus Books Group, 1998
Buku Teks
Taylor, John E.
MIT Press, 1999
Buku Teks
Coni Agustin
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2012
UI - Skripsi Open
Sturgeon, Scott, 1961-
Routledge, 2000
Buku Teks SO
Blackmore, Susan
Oxford University Press, 2005
Buku Teks SO