Dugan, P. J. (1990). Wetland conservation: A review of current issues and required action. IUCN - The World Conservation Union.
Chicago-Zitierstil (17. Ausg.)Dugan, Patrick J. Wetland Conservation: A Review of Current Issues and Required Action. Gland, Switzerland: IUCN - The World Conservation Union, 1990.
MLA-Zitierstil (9. Ausg.)Dugan, Patrick J. Wetland Conservation: A Review of Current Issues and Required Action. IUCN - The World Conservation Union, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.