APA (7th ed.) Citation

Watterson, H. (2005). Marse Henry (Volume 1) An Autobiography. Project Gutenberg.

Chicago Style (17th ed.) Citation

Watterson, Henry. Marse Henry (Volume 1) An Autobiography. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Watterson, Henry. Marse Henry (Volume 1) An Autobiography. Project Gutenberg, 2005.

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