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