Knox, George A
"Unesco ,
Buku Teks
by Lincoln D. Cathers...[et al.]; editor, J.F. Peel Brahtz
John Wiley, 1972
Buku Teks
Anthem Press, 2012
eBooks
Kantner, John F.
Lixington Books, 1975
Buku Teks
edited by John F. Kantner, Lee McCaffrey
Lexington Books, 1975
Buku Referensi