Harper, W. R. (1967). Contact and frictional electrification. Oxford: Clarendon Pr..
Chicago Style CitationHarper, W. R. Contact and Frictional Electrification. Oxford: Clarendon Pr., 1967.
MLA CitationHarper, W. R. Contact and Frictional Electrification. Oxford: Clarendon Pr., 1967.
Warning: These citations may not always be 100% accurate.