APA (7th ed.) Citation

Brown, J. S., & Rocher, G. (2013). The definitive guide to Grails 2. Apress.

Chicago Style (17th ed.) Citation

Brown, Jeff Scott, and Graeme Rocher. The Definitive Guide to Grails 2. [New York]: Apress, 2013.

MLA (9th ed.) Citation

Brown, Jeff Scott, and Graeme Rocher. The Definitive Guide to Grails 2. Apress, 2013.

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