एपीए उद्धरण

Polakkattil, G., & Puliyoor Mohanan Namboothiri. (2007). Jyothishmathy noottandu panchangam 1925 - 2025 (2nd ed.). D C Books.

शिकागो स्टाइल उद्धरण

Polakkattil, G.V, और Puliyoor Mohanan Namboothiri. Jyothishmathy Noottandu Panchangam 1925 - 2025. 2nd ed. Kottayam: D C Books, 2007.

एमएलए उद्धरण

Polakkattil, G.V, और Puliyoor Mohanan Namboothiri. Jyothishmathy Noottandu Panchangam 1925 - 2025. 2nd ed. D C Books, 2007.