Holcombe, Arthur N.
New York University press, 1948
Buku Teks
Robertson, Arthur Henry, 1913-, author
Manchester University Press, 1992
Buku Teks
Selby, David, author
Cambridge University Press, 1988
Buku Teks
Unesco, 1970
Buku Teks
Cassesse, Antonio, author
Yayasan Obor Indonesia , 1993-1994
Buku Teks