एपीए उद्धरण

Sosa, R. (1997). Recognition of agroforestry systems shadow-coffee and their characteristics of rentability and risk in Rivas Pérez Zeledón, Costa Rica.

शिकागो स्टाइल उद्धरण

Sosa, Rosa. Recognition of Agroforestry Systems Shadow-coffee and Their Characteristics of Rentability and Risk in Rivas Pérez Zeledón, Costa Rica. 1997.

एमएलए उद्धरण

Sosa, Rosa. Recognition of Agroforestry Systems Shadow-coffee and Their Characteristics of Rentability and Risk in Rivas Pérez Zeledón, Costa Rica. 1997.