Purcell, E. M. (1985). Electricity and magnetism (2nd ed.). McGraw-Hill.
Dyfyniad Arddull ChicagoPurcell, Edward M. Electricity and Magnetism. 2nd ed. New York: McGraw-Hill, 1985.
Dyfyniad MLAPurcell, Edward M. Electricity and Magnetism. 2nd ed. McGraw-Hill, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.