Elixhauser, Sophie, author
Routledge, Taylor & Francis Group, 2018
Buku Teks
edited by Howard Giles
Cambridge University Press, 2016
Buku Teks
Mayberry, Grant E., author
American Management Association, 1993
eBooks
Hoovers Institution Press, 1978
Buku Teks
University of Queensland Press : The Australian Studies Centre
Majalah, Jurnal, Buletin