Fritchey, Grant
Springer, 2012
eBooks
Rowe, Jeff
Bo Shuo Gu Wen You Xiangong Si, 1996
Buku Teks
Joshua Kurniawan Djafar
Fakultas Ilmu Komputer Universitas Indonesia, 1992
UI - Skripsi Membership
Ade Melani
Fakultas Ilmu Komputer Universitas Indonesia, 2007
UI - Skripsi Membership
Wiederhold, Gio
McGraw-Hill, 1977
Buku Teks SO