Hyde, Charles Cheney, 1873-1952
Little, Brown, 1947, 1951
Buku Teks SO
Born, Gary B.
Kluwer law and Taxation Publishers, 1994
Buku Teks
Parks, Wallace Judson
Johns Hopkins Press, 1951
Buku Teks SO
Clark, Victor S.
Peter Smith, 1949
Buku Teks SO
Emerson, Thomas I.
Little, Brown, 1981
Buku Teks SO