1. Keithley Joseph F. The Story of Electrical and Magnetic Measurements- From 500 BC to the 1940s.  New York: IEEE Press, 1999.

2. MacMillian Encyclopedia of Physics- Volume 1. New York: MacMillian Reference USA / Simon & Schuster MacMillian, 1996.

3. The New Encyclopedia Britannica- Volume 3. Chicago: Encyclopedia Britannica, Inc., 2002. 

4. Serway Raymond A. and Beichner Robert J. Physics For Scientists and Engineers- Fifth Edition. Fort Worth: Saunders College Publishing, 2000.

5. http://library.thinkquest.org/10170/voca/coulombb.htm (Biography on Coulomb).

6. http://www.geocities.com/bioelectrochemistry/coulomb.htm (Biography on Coulomb).

7. http://www-gap.dcs.st-and.ac.uk/~history/PictDisplay/Coulomb.html.  (Bust Image of Coulomb).

8. http://www.fis.uc.pt/museu/129ingig.htm (Torsion balance image).