Dover, D., & Dafforn, E. (2011). Search engine optimization (SEO) secrets: Do what you never though possible with SEO. Wiley Pub., Inc..
Chicago-viite (17. p.)Dover, Danny, ja Erik Dafforn. Search Engine Optimization (SEO) Secrets: Do What You Never Though Possible with SEO. Indianapolis, Ind.: Wiley Pub., Inc., 2011.
MLA-viite (9. p.)Dover, Danny, ja Erik Dafforn. Search Engine Optimization (SEO) Secrets: Do What You Never Though Possible with SEO. Wiley Pub., Inc., 2011.
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