APA (7th ed.) Citation

Roy, L. E., & Barbour, H. S. (2011). Polly in New York. Project Gutenberg.

Chicago Style (17th ed.) Citation

Roy, Lillian Elizabeth, and Harold S. Barbour. Polly in New York. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Roy, Lillian Elizabeth, and Harold S. Barbour. Polly in New York. Project Gutenberg, 2011.

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