Mandelstam, S., & Yourgrau, W. (1968). Variational principles in dynamics and quantum theory (3d ed.). Saunders College Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMandelstam, Stanley, और Wolfgang Yourgrau. Variational Principles in Dynamics and Quantum Theory. 3d ed. Philadelphia: Saunders College Publishing, 1968.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMandelstam, Stanley, और Wolfgang Yourgrau. Variational Principles in Dynamics and Quantum Theory. 3d ed. Saunders College Publishing, 1968.
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