University of California Press, 1971
Buku Teks
Hoover Institution Press, 1988
Buku Teks
Majault, Joseph
UNESCO, 1963
Buku Teks
Roman, Stephan, author
Mansell, 1990
Buku Teks
Haslam, S. M. (Sylvia Mary), 1934-, author
Cambridge University Press, 2014
Buku Teks