APA (7th ed.) Citation

Wiggin, K. D. S., & Smith, N. A. (2010). Golden Numbers: A Book of Verse for Youth. Project Gutenberg.

Chicago Style (17th ed.) Citation

Wiggin, Kate Douglas Smith, and Nora Archibald Smith. Golden Numbers: A Book of Verse for Youth. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Wiggin, Kate Douglas Smith, and Nora Archibald Smith. Golden Numbers: A Book of Verse for Youth. Project Gutenberg, 2010.

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