Khurana, K. J. S., & Markanday, R. (2010). Maths 18 days wonder. S Chand & Co Ltd.
Chicago Edition CitationKhurana, K. J. S., i R. Markanday. Maths 18 Days Wonder. New Delhi: S Chand & Co Ltd, 2010.
Cita MLAKhurana, K. J. S., i R. Markanday. Maths 18 Days Wonder. S Chand & Co Ltd, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.