Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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