APA (7th ed.) Citation

Herbert & Zend Technologies. (2005). ZEND PHP certification study guide. SAMS Pub..

Chicago Style (17th ed.) Citation

Herbert and Zend Technologies. ZEND PHP Certification Study Guide. Indianapolis: SAMS Pub., 2005.

MLA (9th ed.) Citation

Herbert and Zend Technologies. ZEND PHP Certification Study Guide. SAMS Pub., 2005.

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