APA (7th ed.) Citation

Mathews, B. (2005). The Book of Missionary Heroes. Project Gutenberg.

Chicago Style (17th ed.) Citation

Mathews, Basil. The Book of Missionary Heroes. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Mathews, Basil. The Book of Missionary Heroes. Project Gutenberg, 2005.

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