Cita APA (7a ed.)
Butcher, M. (2010). Drupal 7 module development: Create your own Drupal 7 modules from scratch. Packt.
Cita Chicago Style (17a ed.)
Butcher, Matt. Drupal 7 Module Development: Create Your Own Drupal 7 Modules from Scratch. Birmingham, UK: Packt, 2010.
Cita MLA (9a ed.)
Butcher, Matt. Drupal 7 Module Development: Create Your Own Drupal 7 Modules from Scratch. Packt, 2010.
Precaución: Estas citas no son 100% exactas.