APA (7th ed.) Citation

Williamson, A. (2013). Forbidden worlds (First edition.). Dark Horse Books.

Chicago Style (17th ed.) Citation

Williamson, Al. Forbidden Worlds. First edition. Milwaukie, Oregon: Dark Horse Books, 2013.

MLA (9th ed.) Citation

Williamson, Al. Forbidden Worlds. First edition. Dark Horse Books, 2013.