Lewis, Richard J., author
Wiley-Interscience, 2002
Buku Referensi
editors, Gerald P. Koocher, John C. Norcross, Sam S. Hill, III
Oxford University Press, 2005
Buku Teks
editors, Gerald P. Koocher, John C. Norcross, Sam S. Hill, III.
Oxford University Press, 2005
Buku Teks
Donzel, E. Van, author
E.J. Brill, 1994
Buku Referensi
New-York: Prentice Hall, 1993,
Buku Referensi