APA (7th ed.) Citation

Van Loon, H. W. (2006). Ancient Man: The Beginning of Civilizations. Project Gutenberg.

Chicago Style (17th ed.) Citation

Van Loon, Hendrik Willem. Ancient Man: The Beginning of Civilizations. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Van Loon, Hendrik Willem. Ancient Man: The Beginning of Civilizations. Project Gutenberg, 2006.

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