APA (7th ed.) Citation

United States. Public Health Service. (2011). Diphtheria how to recognize the disease, how to keep from catching it, how to treat those who do catch it. Project Gutenberg.

Chicago Style (17th ed.) Citation

United States. Public Health Service. Diphtheria How to Recognize the Disease, How to Keep from Catching It, How to Treat Those Who Do Catch It. Project Gutenberg, 2011.

MLA (9th ed.) Citation

United States. Public Health Service. Diphtheria How to Recognize the Disease, How to Keep from Catching It, How to Treat Those Who Do Catch It. Project Gutenberg, 2011.

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