APA (7th ed.) Citation

Plank, M. (1949). Introduction to theoretical physics. The Macmillan.

Chicago Style (17th ed.) Citation

Plank, Max. Introduction to Theoretical Physics. Nueva York: The Macmillan, 1949.

MLA (9th ed.) Citation

Plank, Max. Introduction to Theoretical Physics. The Macmillan, 1949.