APA (7th ed.) Citation

United States. Department of Agriculture. Office of the Secretary & Wetmore, A. (1916). Birds of Porto Rico. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Department of Agriculture. Office of the Secretary and Alexander Wetmore. Birds of Porto Rico. Washington: U.S. GPO, 1916.

MLA (9th ed.) Citation

United States. Department of Agriculture. Office of the Secretary and Alexander Wetmore. Birds of Porto Rico. U.S. GPO, 1916.

Warning: These citations may not always be 100% accurate.