Losee, John, author
Oxford University Press, 1980
Buku Teks
Ridley, B.K., author
Routledge, 2001
Buku Teks
edited by John K. Ryan
The Catholic University of America Press, 1963
Buku Teks
Goodman, Nelson, author
Routledge, 1988
Buku Teks
Drake, Stillman
University of Toronto Press, 1999
Buku Teks