APA (7th ed.) Citation

Harcourt, C., & Thornback, J. (1990). Lemurs of Madagascar and the Comoros: The IUCN red data book. IUCN.

Chicago Style (17th ed.) Citation

Harcourt, Caroline, and Jane Thornback. Lemurs of Madagascar and the Comoros: The IUCN Red Data Book. Gland, Switzerland: IUCN, 1990.

MLA (9th ed.) Citation

Harcourt, Caroline, and Jane Thornback. Lemurs of Madagascar and the Comoros: The IUCN Red Data Book. IUCN, 1990.