Hilburn, John L., 1938-
Prentice-Hall, 1976
Buku Teks SO
Osborne, Adam
McGraw-Hill, 1983
Buku Teks
Capron, H.L.
The Benjamin / Cumming Publishing Company Inc., 1989
Buku Teks
Lewis, T.G. (Theodore Gyle)
Hayden Book Company, Inc., 1976
Buku Teks SO
Givone, Donald D.
McGraw-Hill, 1980
Buku Teks SO