Gaya APA

Davis, S, A., Ledgerwood, B, K. (1961). Electromechanical components for servomechanisms . New York: McGraw-Hill, Book Company, Inc..

Gaya MLA

Davis, Sidney, A.., Ledgerwood, Byron, K.. "Electromechanical components for servomechanisms". New York: McGraw-Hill, Book Company, Inc., 1961. Text.