Cita APA (7a ed.)

Harnwell, G. P. (1938). Principles of electricity and electromagnetism. McGraw-Hill.

Cita Chicago Style (17a ed.)

Harnwell, Gaylord P. Principles of Electricity and Electromagnetism. New York: McGraw-Hill, 1938.

Cita MLA (8a ed.)

Harnwell, Gaylord P. Principles of Electricity and Electromagnetism. McGraw-Hill, 1938.