Barros, James, editor
Bumi Aksara, 1990
Buku Teks
edited by James Barros
The Free Press, 1972
Buku Teks
by United Nations
Departement of Public Information - United Nations, 1956
Buku Teks
Whittaker, David J., author
Routledge, 1997
Buku Teks
Coyle, David Cushman, 1887-1969, author
The New Americanan Library, 1962
Buku Teks