Philip CF Chan, Asanga Gunawansa, Lim Chong Fong, Arthur Mclnnis
Lexis Nexis , 2009
Buku Teks
Jesus Felipe; Rana Hasan, editor
Palgrave Macmillan, 2006
Buku Teks
Leslie, Douglas L.
West Publishing Company, 1979
Buku Teks
Gould, William B., IV
MIT Press, 1982
Buku Teks
Leslie, Douglas L.
West Publishing, 1992
Buku Teks