Young, J.Z.
At The Clarendon Press, 1962
Buku Teks
Young, J.Z.
Oxford University Press , 1981
Buku Teks
William N. McFarland ...[et al.]
Macmillan, 1979
Buku Teks
Pough, F. Harvey, author
Prentice-Hall, 1996
Buku Teks
Torrey, Theodore W., author
John Wiley & Sons, 1979
Buku Teks