APA (7th ed.) Citation

Duhamel, G., & Simmonds, F. (2003). The New Book of Martyrs. Project Gutenberg.

Chicago Style (17th ed.) Citation

Duhamel, Georges, and Florence Simmonds. The New Book of Martyrs. Project Gutenberg, 2003.

MLA (9th ed.) Citation

Duhamel, Georges, and Florence Simmonds. The New Book of Martyrs. Project Gutenberg, 2003.

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