APA (7th ed.) Citation

Spring, H. (1942). Need more steam from your boilers? Power, 86, 41.

Chicago Style (17th ed.) Citation

Spring, H. "Need More Steam from Your Boilers?" Power 86 (1942): 41.

MLA (9th ed.) Citation

Spring, H. "Need More Steam from Your Boilers?" Power, vol. 86, 1942, p. 41.