APA (7th ed.) Citation

Spets, S. (2013). Programming Drupal 7 entities. Packt Pub..

Chicago Style (17th ed.) Citation

Spets, Sammy. Programming Drupal 7 Entities. Birmingham: Packt Pub., 2013.

MLA (9th ed.) Citation

Spets, Sammy. Programming Drupal 7 Entities. Packt Pub., 2013.

Warning: These citations may not always be 100% accurate.