एपीए उद्धरण

Dugan, P. J. (1990). Wetland conservation: A review of current issues and required action.

शिकागो स्टाइल उद्धरण

Dugan, Patrick J. Wetland Conservation: A Review of Current Issues and Required Action. Switzerland, ICUN, 1990.

एमएलए उद्धरण

Dugan, Patrick J. Wetland Conservation: A Review of Current Issues and Required Action. 1990.