एपीए उद्धरण

Popenoe, H. (1976). Soil conservation in Central America and Panama: Current problems.

शिकागो स्टाइल उद्धरण

Popenoe, Hugh. Soil Conservation in Central America and Panama: Current Problems. 1976.

एमएलए उद्धरण

Popenoe, Hugh. Soil Conservation in Central America and Panama: Current Problems. 1976.