edited by Howard Giles
Cambridge University Press, 2016
Buku Teks
Mayberry, Grant E.
American Management Association, 1993
eBooks
Durrant, Fiona
Facet Publishing, 2006
Buku Teks
Hoovers Institution Press, 1978
Buku Teks
University of Queensland Press : The Australian Studies Centre
Majalah, Jurnal, Buletin