APA (7th ed.) Citation

Boertlein, J. (2001). Howdunit. Writer's Digest Books.

Chicago Style (17th ed.) Citation

Boertlein, John. Howdunit. Cincinnati, Ohio: Writer's Digest Books, 2001.

MLA (9th ed.) Citation

Boertlein, John. Howdunit. Writer's Digest Books, 2001.