Ryan F A. (1962). Efficiency for small manufacturers. Asia Pub. House.
Cita Chicago (17th ed.)Ryan F A. Efficiency for Small Manufacturers. Bombay: Asia Pub. House, 1962.
Cita MLA (9th ed.)Ryan F A. Efficiency for Small Manufacturers. Asia Pub. House, 1962.
Atenció: Aquestes cites poden no estar 100% correctes.