Scoles, Eugene F., author
West Publishing, 1967
Buku Teks
Reese, Willis L.M., author
Foundation Press, 1971
Buku Teks
Mehren, Arthur Taylor von, author
Little, Brown, 1965
Buku Teks
Collier, John G. (John Greenwood), author
Cambridge University Pers, 1994
Buku Teks
Rutter, William A., author
s.n., 1973
Buku Teks