Sudheera, K. (2013). Piramidukalude nattil. Mathrubhumi Books.
Chicago Style aipamenaSudheera, K.P. Piramidukalude Nattil. Kozhikode: Mathrubhumi Books, 2013.
MLA aipamenaSudheera, K.P. Piramidukalude Nattil. Mathrubhumi Books, 2013.
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