Παραπομπή σε μορφή APA (7η εκδ.)

Coggeshall, J., & Tabini, M. (2005). The Zend PHP certification practice test book: Practice questions for the zend certified engineer exam. Marco Tabini & Assoc..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Coggeshall, John, και Marco Tabini. The Zend PHP Certification Practice Test Book: Practice Questions for the Zend Certified Engineer Exam. Toronto, Ont.: Marco Tabini & Assoc., 2005.

Παραπομπή σε μορφή MLA (8th εκδ.)

Coggeshall, John, και Marco Tabini. The Zend PHP Certification Practice Test Book: Practice Questions for the Zend Certified Engineer Exam. Marco Tabini & Assoc., 2005.