APA (7th ed.) Citation

Boutell, C., Fox-Davies, A. C., & Utting, R. B. (2007). The Handbook to English Heraldry. Project Gutenberg.

Chicago Style (17th ed.) Citation

Boutell, Charles, Arthur Charles Fox-Davies, and R. B. Utting. The Handbook to English Heraldry. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Boutell, Charles, et al. The Handbook to English Heraldry. Project Gutenberg, 2007.

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