Cita APA

Bull, H. S., & Bull, H. S. (1974). Direct-current machinery. New York, New York: J. Wiley.

Citación estilo Chicago

Bull, Hempstead S., y Hempstead S. Bull. Direct-current Machinery. New York, New York: J. Wiley, 1974.

Cita MLA

Bull, Hempstead S., y Hempstead S. Bull. Direct-current Machinery. New York, New York: J. Wiley, 1974.