Hoovers Institution Press, 1978
Buku Teks
Mayberry, Grant E., author
American Management Association, 1993
eBooks
University of Queensland Press : The Australian Studies Centre
Majalah, Jurnal, Buletin
Durrant, Fiona, author
Facet Publishing, 2006
Buku Teks
selected and introduced by Carl Harrison-Ford; foreword by Osmar White
Lothian , 1986
Buku Teks