Patrick, John J., author
Prentice Hall PTR, 1999
Buku Teks
Codd, E.F., author
Addison-Wesley, 1990
Buku Teks
Hadi Kusalamwardi, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1985
UI - Skripsi (Membership)
Price, Jason, author
McGraw-Hill, 2008
Buku Teks
Shaw, Scott, author
Springer, 2012
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