Abraham, Henry J., author
Oxford University Press, 1977
Buku Teks
Abraham, Henry J., author
Oxford University Press, 1982
Buku Teks
Abraham, Henry J., author
Oxford University Press, 1988
Buku Teks
edited by Richard L. Perry and John C. Cooper
American Bar Foundation, 1964
Buku Teks
Hurst, James Willard
The University of Wisconsin Press, 1956
Buku Teks