توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Harden, L., & Heyman, B. (2009). Digital engagement: Internet marketing that captures customers and builds intense brand loyalty. American Management Association.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Harden, Leland, و Bob Heyman. Digital Engagement: Internet Marketing That Captures Customers and Builds Intense Brand Loyalty. New York: American Management Association, 2009.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Harden, Leland, و Bob Heyman. Digital Engagement: Internet Marketing That Captures Customers and Builds Intense Brand Loyalty. American Management Association, 2009.