Koontz, Harold, author
Erlangga, 1980
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 2009
Buku Teks
Roby Eko Primadi, author
Fakultas Ilmu Komputer Universitas Indonesia, 2019
UI - Tugas Akhir
Etzioni, Amitai, author
Prentice-Hall, 1964
Buku Teks
Purba, Radiks, author
Rosadi , 1967
Buku Teks