Bialko, M.
Prentice-Hall, 1995
Buku Teks
Academic Press, 2015
eBooks
Gourdon, Xavier
Ellipses, 1994
Buku Teks SO
Virda Onglau Renza
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2007
UI - Tesis Membership
Gross, Jonathan L.
Chapman & Hall/CRC Taylor & Francis Group, 2008
Buku Teks SO