एपीए उद्धरण

Kelu, P. Environmental education: A conceptual analysis. Calicut University.

शिकागो स्टाइल उद्धरण

Kelu, P. Environmental Education: A Conceptual Analysis. Calicut University.

एमएलए उद्धरण

Kelu, P. Environmental Education: A Conceptual Analysis. Calicut University.