APA (7th ed.) Citation

Engle, M. (2010). The firefly letters: A suffragette's journey to Cuba. Henry Holt.

Chicago Style (17th ed.) Citation

Engle, Margarita. The Firefly Letters: A Suffragette's Journey to Cuba. New York: Henry Holt, 2010.

MLA (8th ed.) Citation

Engle, Margarita. The Firefly Letters: A Suffragette's Journey to Cuba. Henry Holt, 2010.

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