APA (7th ed.) Citation

Sommerfeld, A. (1964). Lectures on theoretical physics (1st pbk. ed.). Academic Press.

Chicago Style (17th ed.) Citation

Sommerfeld, Arnold. Lectures on Theoretical Physics. 1st pbk. ed. New York: Academic Press, 1964.

MLA (9th ed.) Citation

Sommerfeld, Arnold. Lectures on Theoretical Physics. 1st pbk. ed. Academic Press, 1964.