Shakuntala devi. (1979). Figuring the joy of numbers. Coronet Books.
Cita Chicago (17th ed.)Shakuntala devi. Figuring the Joy of Numbers. London: Coronet Books, 1979.
Cita MLA (9th ed.)Shakuntala devi. Figuring the Joy of Numbers. Coronet Books, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.