Citazione Stile APA (7a Edizione)
Butcher, M. (2008). Learning Drupal 6 module development: A practical tutorial for creating your first Drupal 6 modules with PHP. Packt.
Citazione stile Chigago Style (17a edizione)
Butcher, Matt. Learning Drupal 6 Module Development: A Practical Tutorial for Creating Your First Drupal 6 Modules with PHP. Birmingham: Packt, 2008.
Citatione MLA (9a ed.)
Butcher, Matt. Learning Drupal 6 Module Development: A Practical Tutorial for Creating Your First Drupal 6 Modules with PHP. Packt, 2008.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.