APA (7th ed.) Citation

Clark, R. J., Smith, D. G., & Kelso, L. H. (1978). Working bibliography of owls of the world: With summaries of current taxonomy and distributional status. Raptor Information Center, National Wildlife Federation.

Chicago Style (17th ed.) Citation

Clark, Richard J., Dwight G. Smith, and Leon H. Kelso. Working Bibliography of Owls of the World: With Summaries of Current Taxonomy and Distributional Status. Washington, D.C.: Raptor Information Center, National Wildlife Federation, 1978.

MLA (9th ed.) Citation

Clark, Richard J., et al. Working Bibliography of Owls of the World: With Summaries of Current Taxonomy and Distributional Status. Raptor Information Center, National Wildlife Federation, 1978.