APA (7th ed.) Citation

Sommerfeld, A. (1964). Lectures on theoretical physics. Academic Press.

Chicago Style (17th ed.) Citation

Sommerfeld, Arnold. Lectures on Theoretical Physics. New York: Academic Press, 1964.

MLA (8th ed.) Citation

Sommerfeld, Arnold. Lectures on Theoretical Physics. Academic Press, 1964.

Warning: These citations may not always be 100% accurate.