Cita APA (7a ed.)

Butcher, M. (2008). Learning Drupal 6 module development: A practical tutorial for creating your first Drupal 6 modules with PHP. Packt.

Cita Chicago Style (17a ed.)

Butcher, Matt. Learning Drupal 6 Module Development: A Practical Tutorial for Creating Your First Drupal 6 Modules with PHP. Birmingham: Packt, 2008.

Cita MLA (9a ed.)

Butcher, Matt. Learning Drupal 6 Module Development: A Practical Tutorial for Creating Your First Drupal 6 Modules with PHP. Packt, 2008.