Perry, Michael J
Oxford University Press, 1991
Buku Teks
Perry, Michael J.
Oxford University Press , 1990
Buku Teks
Zimmerman, Michael J.
Cambridge University Press , 1996
Buku Teks
Perry, J. Harvey
University of Toronto Press, 1953
Buku Teks
Cox, Harvey G.
I.B. Tauris , 2009
Buku Teks