edited by Marco R. Di Tommaso and Stuart O. Schweitzer
Edward Elgar, 2005
Buku Teks
Johannes M. Bauer, Achim Lang, Volker Schneider, editors
[Springer, ], 2012
eBooks
Nanda, Vic, author
McGraw-Hill, 2011
Buku Teks
Reese, Charles D., author
CRC Press, 2009
Buku Referensi
Arnold, part of the Hodder Headline group, 2018
Majalah, Jurnal, Buletin