Cita APA (7th ed.)
Subrahmanyam, N., & Lal, B. (1966). A Text Book of Optics. S. Chand & Company.
Cita Chicago (17th ed.)
Subrahmanyam, N., i Brij Lal. A Text Book of Optics. New Delhi: S. Chand & Company, 1966.
Cita MLA (9th ed.)
Subrahmanyam, N., i Brij Lal. A Text Book of Optics. S. Chand & Company, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.