Citazione Stile APA (7a Edizione)

HARNWELL, G. P., & Gaylord P. HARNWELL. (1949). Principles of electricity and electromagnetism. 2nd ed. McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

HARNWELL, Gaylord P., e Gaylord P. HARNWELL. Principles of Electricity and Electromagnetism. 2nd Ed. New York: McGraw-Hill, 1949.

Citatione MLA (9a ed.)

HARNWELL, Gaylord P., e Gaylord P. HARNWELL. Principles of Electricity and Electromagnetism. 2nd Ed. McGraw-Hill, 1949.