References

1. "Power Up." Sandra Markle, Atheneum: New York, 1989, p. 24.
2. "The Science Book of Electricity." Neil Ardley, Harcourt Brace and Company: London, 1991.
3. "Science Experiments with Electricity." Sally Nankivell-Aston and Dorothy Jackson, Franklin Watts: New York, 2000.
4. "Awesome Experiments in Electricity and Magnetism." Michael DiSpezio, Sterling Publishing Co.: New York, 1998.
5. "Edison Etc." The Wild Goose Company: Salt Lake City, 1994.
6. "How Science Works," Judith Hann, Reader’s Digest, Dorling Kindersley Limited, 1991.