Gohagan, John Kenneth, author
McGraw-Hill, 1980
Buku Teks
Bozeman, Barry, author
St. Martin's Press, 1979
Buku Teks
by Peter Knoepfel ... [and others]
Policy Press, 2007
Buku Teks
Bellinger, William Kenneth, author
Routledge, 2007
Buku Teks SO
Hayatun Nisa, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2015
UI - Tesis Membership