Rothery, Brian, author
Pustaka Binaman Pressindo, 1996
Buku Teks
Hutchins, Greg, author
Oliver Wright Publications, 1994
Buku Referensi
Manajemen Usahawan Indonesia, XXXII (03) Maret 2003: 3-8, 2003
Artikel Jurnal
Nelson, Charles
McGraw-Hill , 1995
Buku Teks
Rahmat Subadi, author
Fakultas Teknik Universitas Indonesia, 2000
UI - Tesis (Membership)