Bastien, G., & Degu, C. A. (2003). CCSP selfstudy CCSP cisco secure PIX firewall advanced exam certification guide. Pearson Education.
استشهاد بنمط شيكاغوBastien, Greg, و Christian Abera Degu. CCSP Selfstudy CCSP Cisco Secure PIX Firewall Advanced Exam Certification Guide. Delhi: Pearson Education, 2003.
MLA استشهادBastien, Greg, و Christian Abera Degu. CCSP Selfstudy CCSP Cisco Secure PIX Firewall Advanced Exam Certification Guide. Pearson Education, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.