APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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