APA (7th ed.) Citation

Trafton, A., & Humphrey, L. B. (2010). An American Girl Abroad. Project Gutenberg.

Chicago Style (17th ed.) Citation

Trafton, Adeline, and Lizbeth Bullock Humphrey. An American Girl Abroad. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Trafton, Adeline, and Lizbeth Bullock Humphrey. An American Girl Abroad. Project Gutenberg, 2010.

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