एपीए उद्धरण

P. Horn, S. (1989). Prehistoric fires in the Chirripó highlands of Costa Rica: Sedimentary charcoal evidence.

शिकागो स्टाइल उद्धरण

P. Horn, Sally. Prehistoric Fires in the Chirripó Highlands of Costa Rica: Sedimentary Charcoal Evidence. 1989.

एमएलए उद्धरण

P. Horn, Sally. Prehistoric Fires in the Chirripó Highlands of Costa Rica: Sedimentary Charcoal Evidence. 1989.