APA (7th ed.) Citation

Zend Technologies & Herbert, S. (2005). Zend PHP certification study guide. Sams Pub..

Chicago Style (17th ed.) Citation

Zend Technologies and Stuart Herbert. Zend PHP Certification Study Guide. Indianapolis, Ind: Sams Pub., 2005.

MLA (8th ed.) Citation

Zend Technologies and Stuart Herbert. Zend PHP Certification Study Guide. Sams Pub., 2005.