Kauper, Paul G.
Little, Brown, 1971
Buku Teks
Keir, David Lindsay
Oxford University Press, 1948
Buku Teks
Keir, David Lindsay
Clarendon Press, 1967
Buku Teks
Barrett, Edward L.
Foundation Press, 1977
Buku Teks
Gunther, Gerald
Foundation Press, 1970
Buku Teks