APA (7th ed.) Citation

Roy, L. E., & Barbour, H. S. (2011). Polly and Her Friends Abroad. Project Gutenberg.

Chicago Style (17th ed.) Citation

Roy, Lillian Elizabeth, and Harold S. Barbour. Polly and Her Friends Abroad. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Roy, Lillian Elizabeth, and Harold S. Barbour. Polly and Her Friends Abroad. Project Gutenberg, 2011.

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