Simpson, Stephen Milton, author
Addison-Wesley, 1966
Buku Teks
Becketti, Sean, author
Stata Press, 2013
Buku Teks
Brown, Robert Goodell
Prentice-Hall, 1963
Buku Teks
Data General Corporation, 1974
Buku Referensi
Jogiyanto H.M. (Hartono M.), author
Andi, 1989
Buku Teks