APA (7th ed.) Citation

Harding, C. F., & Sprague, C. S. (1933). Impulse tests on distribution transformers. Electrical Engineering., 52, 678.

Chicago Style (17th ed.) Citation

Harding, C. F., and C. S. Sprague. "Impulse Tests on Distribution Transformers." Electrical Engineering. 52 (1933): 678.

MLA (9th ed.) Citation

Harding, C. F., and C. S. Sprague. "Impulse Tests on Distribution Transformers." Electrical Engineering., vol. 52, 1933, p. 678.