Cita APA (7th ed.)

Efron,Alexander. (1957). Sound (NA.). Vakils,Feffer & Simons Private LTD.

Cita Chicago (17th ed.)

Efron,Alexander. Sound. NA. Bombay: Vakils,Feffer & Simons Private LTD, 1957.

Cita MLA (9th ed.)

Efron,Alexander. Sound. NA. Vakils,Feffer & Simons Private LTD, 1957.

Atenció: Aquestes cites poden no estar 100% correctes.