Treadwell, James, author
Sage, 2020
Buku Teks
Barlow, Hugh D.
Litle, Brown and Company, 1984
Buku Teks
Keith Bryett [and others]
Batterworths, 1993
Buku Teks
Kania, Richard R. E., author
Elsevier , 2012
Buku Teks
Davis, Frederick T, author
Cambridge University Press, 2019
eBooks