Abraham, Henry J.
Oxford University Press, 1977
Buku Teks
edited by Richard L. Perry and John C. Cooper
American Bar Foundation, 1964
Buku Teks
Abraham, Henry J.
Oxford University Press, 1982
Buku Teks
Foster, Steve
Oxford university press, 2012
Buku Teks
Whipple, Leon
Da Capo Press, 1972
Buku Teks