APA (7th ed.) Citation

Wall, K., & Von Hagen, W. (2004). The definitive guide to GCC. Apress.

Chicago Style (17th ed.) Citation

Wall, Kurt, and William Von Hagen. The Definitive Guide to GCC. Berkeley, CA: Apress, 2004.

MLA (9th ed.) Citation

Wall, Kurt, and William Von Hagen. The Definitive Guide to GCC. Apress, 2004.