Roberts, Larry S.
McGraw-Hill, 2000
Buku Teks SO
Suttles, Gerald D
University of Chicago Press, 1974
Buku Teks SO
Roberts, Arthur D.
McGraw-Hill, 1968
Buku Teks SO
Jones, Larry D.
John Wiley & Sons, 1983
Buku Teks SO
Berreman, Gerald D.
New York Cornell University 1956,
Buku Teks