APA (7th ed.) Citation

Turtledove, H., & Dufris, W. (2007). Beyond the gap: A novel of the opening of the world (Unabridged.). Tantor Media.

Chicago Style (17th ed.) Citation

Turtledove, Harry, and William Dufris. Beyond the Gap: A Novel of the Opening of the World. Unabridged. Old Saybrook: Tantor Media, 2007.

MLA (8th ed.) Citation

Turtledove, Harry, and William Dufris. Beyond the Gap: A Novel of the Opening of the World. Unabridged. Tantor Media, 2007.

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