एपीए उद्धरण

Hanley, N. (1997). Environmental economics in theory and practice. Macmillan.

शिकागो स्टाइल उद्धरण

Hanley, Nick. Environmental Economics in Theory and Practice. London: Macmillan, 1997.

एमएलए उद्धरण

Hanley, Nick. Environmental Economics in Theory and Practice. Macmillan, 1997.