Professor Lumb Trust Fund. University of Hongkong, 2002
Buku Teks
edited by R.J. Cashmore
World Scientific, 1994
Buku Teks
Jillian R. Griffiths, Jenny Craven, editor
Facet Publishing, 2009
Buku Teks
Vrij, M.P., author
Uitgeversmaatschappij, 1956
Buku Teks
Foster, Thomas C., author
Harper, 2003
Buku Teks