Cita APA (7th ed.)

Harnwell, G. P. (1949). Principles of electricity and electromagnetism (2a. ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Harnwell, Gaylord P. Principles of Electricity and Electromagnetism. 2a. ed. Nueva York: McGraw-Hill, 1949.

Cita MLA (9th ed.)

Harnwell, Gaylord P. Principles of Electricity and Electromagnetism. 2a. ed. McGraw-Hill, 1949.