APA (7th ed.) Citation

Melko, P. (2009). The walls of the universe. Tor.

Chicago Style (17th ed.) Citation

Melko, Paul. The Walls of the Universe. New York: Tor, 2009.

MLA (9th ed.) Citation

Melko, Paul. The Walls of the Universe. Tor, 2009.

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