APA (7th ed.) Citation

Wells, S., Pyle, R. M., & Collins, N. M. (1983). The IUCN invertebrate red data book. IUCN.

Chicago Style (17th ed.) Citation

Wells, Sue, Robert Michael Pyle, and N. Mark Collins. The IUCN Invertebrate Red Data Book. Gland, Switzerland: IUCN, 1983.

MLA (9th ed.) Citation

Wells, Sue, et al. The IUCN Invertebrate Red Data Book. IUCN, 1983.