APA (7th ed.) Citation

American Iris Society & Peckham, E. A. S. (1940). Alphabetical iris check list. The American Iris Society.

Chicago Style (17th ed.) Citation

American Iris Society and Ethel Anson S. Peckham. Alphabetical Iris Check List. Baltimore: The American Iris Society, 1940.

MLA (9th ed.) Citation

American Iris Society and Ethel Anson S. Peckham. Alphabetical Iris Check List. The American Iris Society, 1940.