Cita APA (7a ed.)
Poore, D., & Gryn-Ambross, P. (1980). Nature conservation in northern and Western Europe. IUCN.
Cita Chicago Style (17a ed.)
Poore, Duncan, y Paule Gryn-Ambross. Nature Conservation in Northern and Western Europe. Gland: IUCN, 1980.
Cita MLA (9a ed.)
Poore, Duncan, y Paule Gryn-Ambross. Nature Conservation in Northern and Western Europe. IUCN, 1980.
Precaución: Estas citas no son 100% exactas.