Copi, Irving M., author
Macmillan, 1961
Buku Teks
Copi, Irving M., author
Prentice-Hall, 1995
Buku Teks
Octo Alexandro, author
Fakultas Ilmu Komputer Universitas Indonesia, 2009
UI - Skripsi (Open)
Yohanes Immanuel, author
Fakultas Ilmu Komputer Universitas Indonesia, 2009
UI - Skripsi (Open)
Bittle, Celestine N., author
The Bruce Publishing, 1950
Buku Teks