APA (7th ed.) Citation

White, W. F. (2012). A Scrap-Book of Elementary Mathematics Notes, Recreations, Essays. Project Gutenberg.

Chicago Style (17th ed.) Citation

White, William F. A Scrap-Book of Elementary Mathematics Notes, Recreations, Essays. Project Gutenberg, 2012.

MLA (9th ed.) Citation

White, William F. A Scrap-Book of Elementary Mathematics Notes, Recreations, Essays. Project Gutenberg, 2012.

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