Dover, D., & Dafforn, E. (2011). Search engine optimization secrets: Do what you never thought possible with SEO. Indianapolis, IN: Wiley.
استشهاد بنمط شيكاغوDover, Danny., و Erik Dafforn. Search Engine Optimization Secrets: Do What You Never Thought Possible With SEO. Indianapolis, IN: Wiley, 2011.
MLA استشهادDover, Danny., و Erik Dafforn. Search Engine Optimization Secrets: Do What You Never Thought Possible With SEO. Indianapolis, IN: Wiley, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.