Zend PHP Certification Study Guide by Zend Technologies

PHR and SPHR Complete Study Guide Professional in HR Certification 2018

Zend PHP 5 Certification Study Guide: a php[architect] guide - Shafik, Davey

Microsoft Office 97 User Certification Study Guide Book with CD Training Guide

php|architect's Zend PHP 5 Certification Study Guide,Davey Shafi

Phparchitect's Zend PHP 5 Certification Study Guide by Shafik, Davey, Ramsey, B

Zend Framework 3. Developer's Guide,Adam Omelak

Professional Search Engine Optimization with PHP: A Developer′s Guide to SEO