APA (7th ed.) Citation

Burbidge, E. (2008). The Kingdom of Heaven; What is it? Project Gutenberg.

Chicago Style (17th ed.) Citation

Burbidge, Edward. The Kingdom of Heaven; What Is It? Project Gutenberg, 2008.

MLA (9th ed.) Citation

Burbidge, Edward. The Kingdom of Heaven; What Is It? Project Gutenberg, 2008.

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