Wayland, Robert E
Customer connections: new strategies for growth/Robert E.Wayland & Paul M. Cole
Harvard Business School Press, 1997
 Buku Teks SO
Martin Slama
Indonesian hadhramis and the hadhramaut: an old diaspora and its new connections
Jurnal Antropologi Indonesia, 2005
 Artikel Jurnal
Kuczmarski, Thomas D.
Managing new products: the power of Innovation
Prentice-Hall International, 1992
 Buku Teks SO
Horne, Alistair
Return to power : a report on the new Germany
Praeger, 1956.
 Buku Teks SO
Castells, Manuel
Technopoles of the world : the making of 21st century industrial complexes
Routledge, 1994
 Buku Teks SO