APA (7th ed.) Citation

International Union for Conservation of Nature and Natural Resources. Threatened Plants Committee, Lucas, G., & Synge, H. (1978). The IUCN plant red data book: Comprising red data sheets on 250 selected plants threatened on a world scale. IUCN.

Chicago Style (17th ed.) Citation

International Union for Conservation of Nature and Natural Resources. Threatened Plants Committee, Gren Lucas, and Hugh Synge. The IUCN Plant Red Data Book: Comprising Red Data Sheets on 250 Selected Plants Threatened on a World Scale. Morges, Switzerland: IUCN, 1978.

MLA (9th ed.) Citation

International Union for Conservation of Nature and Natural Resources. Threatened Plants Committee, et al. The IUCN Plant Red Data Book: Comprising Red Data Sheets on 250 Selected Plants Threatened on a World Scale. IUCN, 1978.