Smith, J. C. (John Cyril), author
Butterworth, 1983
Buku Teks
Keenan, Denis, author
Pitman, 1992
Buku Teks
edited by Norman Doe and Russell Sandberg
Routledge, 2017
Buku Teks
Ryder, Nicholas, author
Cambridge University Press , 2012
Buku Teks
Atiyah, P.S., author
Clarendon Press, 1989
Buku Teks