APA (7th ed.) Citation

Say, M. G., & Taylor, E. O. (1980). Direct current machines (2nd ed.). Pitman.

Chicago Style (17th ed.) Citation

Say, M. G., and E. Openshaw Taylor. Direct Current Machines. 2nd ed. London: Pitman, 1980.

MLA (9th ed.) Citation

Say, M. G., and E. Openshaw Taylor. Direct Current Machines. 2nd ed. Pitman, 1980.