Awad, Elias M., author
Prentice-Hall, 1966
Buku Teks SO
Gregory, Robert Henry, author
Wadsworth, 1960
Buku Teks
Brooks, Frederick P. Jr., author
John Wiley & Sons, 1969
Buku Teks
Long, Larry E., author
Reston Publishing, 1979
Buku Teks
Elsevier Scientific Publishing, 1971
Buku Referensi