Coggeshall, J., & Tabini, M. (2005). The Zend PHP certification practice test book: Practice questions for the zend certified engineer exam. Marco Tabini & Assoc..
Čikaški stil citiranja (17. izdanje)Coggeshall, John, i Marco Tabini. The Zend PHP Certification Practice Test Book: Practice Questions for the Zend Certified Engineer Exam. Toronto, Ont.: Marco Tabini & Assoc., 2005.
MLA način citiranja (8. izdanje)Coggeshall, John, i Marco Tabini. The Zend PHP Certification Practice Test Book: Practice Questions for the Zend Certified Engineer Exam. Marco Tabini & Assoc., 2005.
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