एपीए उद्धरण

Valverde, R. (2013). Availability, distribution, quality and perspectives of water in Costa Rica.

शिकागो स्टाइल उद्धरण

Valverde, Ricardo. Availability, Distribution, Quality and Perspectives of Water in Costa Rica. 2013.

एमएलए उद्धरण

Valverde, Ricardo. Availability, Distribution, Quality and Perspectives of Water in Costa Rica. 2013.