APA (7th ed.) Citation

Yourgrau, W., & Mandelstam, S. (1968). Variational principles in dynamics and quantum theory (3d ed.). Saunders.

Chicago Style (17th ed.) Citation

Yourgrau, Wolfgang, and Stanley Mandelstam. Variational Principles in Dynamics and Quantum Theory. 3d ed. Philadelphia: Saunders, 1968.

MLA (9th ed.) Citation

Yourgrau, Wolfgang, and Stanley Mandelstam. Variational Principles in Dynamics and Quantum Theory. 3d ed. Saunders, 1968.