توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Greenberg, P. (2010). CRM (Customer Relationship Management) at the Speed of Light (4th.). Tata McGraw Hill Education Private Limited.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Greenberg, Paul. CRM (Customer Relationship Management) at the Speed of Light. 4th. New Delhi: Tata McGraw Hill Education Private Limited, 2010.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Greenberg, Paul. CRM (Customer Relationship Management) at the Speed of Light. 4th. Tata McGraw Hill Education Private Limited, 2010.