by Albert P. Blaustein, Jay Sigler, Benjamin R. Beede, with Wayne E. Olson
Oceana Publications, 1977
Buku Referensi
editors, Philip Dorling, David Lee
Australian Government Publishing Service, 1996
Buku Teks
Crowley, F.K. (Francis Keble), 1924-2013
Wren Publishing, 1973
Buku Teks
edited by C.K. Webster
Oxford University Press, 1938
Buku Teks
Secretariat of the Women?s International Democratic Federation, 1981
Buku Teks