Cita APA (7a ed.)

Beckwith, B. (2013). Programming grails (1st edition.). O'Reilly.

Cita Chicago Style (17a ed.)

Beckwith, Burt. Programming Grails. 1st edition. Sebastopol: O'Reilly, 2013.

Cita MLA (9a ed.)

Beckwith, Burt. Programming Grails. 1st edition. O'Reilly, 2013.