Cita APA (7th ed.)

Yourgrau, W., & Mandelstam, S. (1960). Variational principles in dynamics and quantum theory (2a. ed.). Pitman Publishing.

Cita Chicago (17th ed.)

Yourgrau, Wolfgang, i Stanley Mandelstam. Variational Principles in Dynamics and Quantum Theory. 2a. ed. Nueva York: Pitman Publishing, 1960.

Cita MLA (9th ed.)

Yourgrau, Wolfgang, i Stanley Mandelstam. Variational Principles in Dynamics and Quantum Theory. 2a. ed. Pitman Publishing, 1960.