Cita APA

Robertson, B. L., & Black, L. J. (1949). Electric circuits and machines D. Van Nostrand.

Citación estilo Chicago

Robertson, B. L., and L. J. Black. Electric Circuits and Machines. 3. ed. Toronto: D. Van Nostrand, 1949.

Cita MLA

Robertson, B. L., and L. J. Black. Electric Circuits and Machines. 3. ed. Toronto: D. Van Nostrand, 1949.