APA (7th ed.) Citation

Fox-Davies, A. C., & Johnston, G. (2012). A Complete Guide to Heraldry. Project Gutenberg.

Chicago Style (17th ed.) Citation

Fox-Davies, Arthur Charles, and Graham Johnston. A Complete Guide to Heraldry. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Fox-Davies, Arthur Charles, and Graham Johnston. A Complete Guide to Heraldry. Project Gutenberg, 2012.

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