Gibilisco, Stan, 1953-, author
Tab Books, 1994
Buku Referensi
text edited by J. Coulson, C.T. Carr, Lucy Hutchinson and Dorohy Eagle; illus. edited by Helen Mary Petter
Clarendon Press, 1962
Buku Referensi
Douglas-Young, John, author
Prentice-Hall, 1983
Buku Referensi
Lincoln, Roger J., author
Cambridge University Press, 1990
Buku Referensi
Clayton, Jade, author
McGraw-Hill, 1998
Buku Referensi