edited by Michael D. Rose
West Publishing, 1996
Buku Teks SO
edited by Douglas A. Kahn
Little, Brown, 1981
Buku Teks SO
Bittker, Boris I.
Little, Brown & Co., 1990
Buku Teks
Gaffney, Dennis J.
McGraw-Hill, 1984
Buku Teks
Williamson, J. Peter (John Peter)
Scott, Foresman, 1968
Buku Teks SO