APA (7th ed.) Citation

Foster, J. V., & Probert, R. E. (1969). Electric controls. Machine Design, 41, 44.

Chicago Style (17th ed.) Citation

Foster, J. V., and R. E. Probert. "Electric Controls." Machine Design 41 (1969): 44.

MLA (9th ed.) Citation

Foster, J. V., and R. E. Probert. "Electric Controls." Machine Design, vol. 41, 1969, p. 44.