Date, C.J.
Addison-Wesley, 1988
Buku Teks SO
Owens, Kevin T.
Prentice-Hall, 1998
Buku Teks SO
Elsevier, 2013
eBooks
McGrath, Mike, 1947- author
Financial World, 2012
Buku Teks SO
Hadi Kusalamwardi
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1985
UI - Skripsi Membership