APA (7th ed.) Citation

Crawford, F. M., & Flagg, J. M. (2012). The Diva's Ruby. Project Gutenberg.

Chicago Style (17th ed.) Citation

Crawford, F. Marion, and James Montgomery Flagg. The Diva's Ruby. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Crawford, F. Marion, and James Montgomery Flagg. The Diva's Ruby. Project Gutenberg, 2012.

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