*{{cite book |last1=Bateman |first1=S. |last2=Brooks |first2=C. |last3=McCalla |first3=G. |last4=Brusilovsky |first4=P. |chapter=Applying collaborative tagging to e-learning |chapter-url=http://www.www2007.org/workshops/paper_56.pdf |title=Proceedings of the 16th International World Wide Web Conference (WWW2007) |date=2007 |citeseerx=10.1.1.64.8892}} | *{{cite book |last1=Bateman |first1=S. |last2=Brooks |first2=C. |last3=McCalla |first3=G. |last4=Brusilovsky |first4=P. |chapter=Applying collaborative tagging to e-learning |chapter-url=http://www.www2007.org/workshops/paper_56.pdf |title=Proceedings of the 16th International World Wide Web Conference (WWW2007) |date=2007 |citeseerx=10.1.1.64.8892}} |