Bohall, Greg, author
Springer, 2017
Buku Teks
Bateson, FW
Longmans , 1965
Buku Teks
Gutzwiller, Kathryn J., author
Blackwell, 2007
Buku Teks
edited by Ian Ousby
Cambridge University Press, 1993
Buku Referensi
edited by Ian Qusby
Cambridge University Press, 1988
Buku Referensi