Grisworld, Ralph E.
Prentice-Hall, 1983
Buku Teks SO
Forsyth, Frederick, 1938-
Gramedia Pustaka Utama, 1999
Buku Teks SO
Riska Inki Fitria
[Publisher not identified], 2016
Artikel Jurnal
Irwansyah
American Scientific Publishers, 2016
Artikel Jurnal
Wozniak, Steve, 1950-
Headline/Review, 2007
Buku Teks