APA (7th ed.) Citation

Duff, A. W., & Plimpton, S. J. (1940). Elements of electro-magnetic theory: By A. Wilmer Duff and Samuel J. Plimpton. The Blakiston company.

Chicago Style (17th ed.) Citation

Duff, Alexander Wilmer, and Samuel James Plimpton. Elements of Electro-magnetic Theory: By A. Wilmer Duff and Samuel J. Plimpton. Philadelphia: The Blakiston company, 1940.

MLA (9th ed.) Citation

Duff, Alexander Wilmer, and Samuel James Plimpton. Elements of Electro-magnetic Theory: By A. Wilmer Duff and Samuel J. Plimpton. The Blakiston company, 1940.