Tusar, M. F. K., & Khan, M. (2011). Google's keyword analysis tool and compare its various metrics for finding the most popular search terms on the web. BRAC University.
Chicago-referens (17:e uppl.)Tusar, Md. Fazlul Karim, och Mumit Khan. Google's Keyword Analysis Tool and Compare Its Various Metrics for Finding the Most Popular Search Terms on the Web. BRAC University, 2011.
MLA-referens (8:e uppl.)Tusar, Md. Fazlul Karim, och Mumit Khan. Google's Keyword Analysis Tool and Compare Its Various Metrics for Finding the Most Popular Search Terms on the Web. BRAC University, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.