Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (8ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.