APA (7th ed.) Citation

Lummis, C. F. (2010). The Spanish Pioneers. Project Gutenberg.

Chicago Style (17th ed.) Citation

Lummis, Charles F. The Spanish Pioneers. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Lummis, Charles F. The Spanish Pioneers. Project Gutenberg, 2010.

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