Cita APA (7a ed.)

Zend Technologies Content Provider, Technologies, Z., & Herbert, S. C. (2005). Zend PHP certification study guide (1st edition.). Sams Pub.

Cita Chicago Style (17a ed.)

Zend Technologies Content Provider, Zend Technologies, y Stuart Contributor Herbert. Zend PHP Certification Study Guide. 1st edition. [Place of publication not identified]: Sams Pub, 2005.

Cita MLA (9a ed.)

Zend Technologies Content Provider, et al. Zend PHP Certification Study Guide. 1st edition. Sams Pub, 2005.