Alcoutt, Louisa May, author
Dover Publications, INC, 2013
Buku Teks
Stern, Philip Van Doren
Fawcett Publications, 1961
Buku Teks
Phillips, Christopher, author
Oxford University Press, 2016
eBooks
Suter, Keith D
United Nations Associations of Australia, 1985
Buku Teks
Pole, J.R., author
University of California Press, 1993
Buku Teks