* {{cite book|last=Lau|first=John H.|last2=Wong|first2=C. P.|last3=Lee|first3=Ning-Cheng|last4=Lee|first4=S. W. Ricky|title=Electronics Manufacturing: With Lead-free, Halogen-free, and Conductive-adhesive Materials|publisher=McGraw-Hill Professional|year=2002|url=http://books.google.com/?id=FuMFzSiKTlUC|isbn=978-0-07-138624-1|ref=harv}}