APA (7th ed.) Citation

International Union for Conservation of Nature and Natural Resources. (1999). Conifers. IUCN.

Chicago Style (17th ed.) Citation

International Union for Conservation of Nature and Natural Resources. Conifers. Switzerland: IUCN, 1999.

MLA (9th ed.) Citation

International Union for Conservation of Nature and Natural Resources. Conifers. IUCN, 1999.

Warning: These citations may not always be 100% accurate.