Cita APA

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

Citación estilo Chicago

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

Cita MLA

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