edited by Fiona Sim, Martin McKee
McGraw-Hill, 2011
Buku Teks
edited by L. Lynn Hogue
An Aspen Publication, 1980
Buku Teks
edited by Mindel C. Sheps and Jeanne Clare Ridley
University of Pittsburgh Press, 1965
Buku Teks
Crawford, John C., author
Chandos, 2013
eBooks
edited by Louis Henkin
Spectrum, 1961
Buku Teks