Graduation thesis is either an automatic footnote or a manual endnote. Tutors often require manual endnotes, and you need to enter superscript numbers yourself.

You enter [4] after "experts predict that all ipv4 will be allocated in 20 10", then select [4] and press Ctrl, Shift and+.

When listing references at the end of the article, please start a new page and list:

[ 1]《 ...

[2]《 ...

[3]《 ...

[4] IPv6 Next Generation Network Technology