PAI, R. (2012). DIDI DIDI AKASH KA RANG NEELA KYON HAI? PRATHAM BOOKS.
Cita Chicago (17th ed.)PAI, RUPA. DIDI DIDI AKASH KA RANG NEELA KYON HAI? PRATHAM BOOKS, 2012.
Cita MLA (9th ed.)PAI, RUPA. DIDI DIDI AKASH KA RANG NEELA KYON HAI? PRATHAM BOOKS, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.