Parish, Romola, author
Routledge,, 2013
Buku Teks
edited by Carmen de Jong, David Collins, Roberto Ranzi
John Wiley & Sons, 2005
Buku Teks
Greenwood, Ned H., author
Duxbury Press, 1979
Buku Teks
Josef Krecek, editor
Springer, 2012
eBooks
Parris, Kristen M., author
John Wiley & Sons, 2016
Buku Teks