edited by Catherine Itzin
Oxford University Press, 1992
Buku Teks
Barker, Lucius J.
Prentice-Hall, 1978
Buku Teks
Longaker, Richard P.
Cornell University Press, 1962
Buku Teks
Abraham, Henry J.
Oxford University Press, 1982
Buku Teks
Scott, F. R. (Francis Reginald)
Published in co-operation with Carleton University by University of Toronto Press, 1959
Buku Teks