edited by M. F. Ashley Montagu
Oxford University Press, 1962
Buku Teks
Cupitt, Don
Sheldon Press, 1979
Buku Teks
Pilbeam, David, author
Funk and Wangnalls, 1970
Buku Teks
edited by Louise B. Young
Oxford University Press, 1970
Buku Teks
Carrel, Alexis, author
Penguin Books, 1967
Buku Teks