APA (7th ed.) Citation

Hathaway, A. S. (2006). A Primer of Quaternions. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hathaway, Arthur S. A Primer of Quaternions. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Hathaway, Arthur S. A Primer of Quaternions. Project Gutenberg, 2006.

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