用到这个包：

\usepackage{url}

 

然后在你的.bib文件里写上

@Misc{timmurphy.org,

howpublished = {\url{http://timmurphy.org/2009/07/22/line-spacing-in-latex-documents/}},

note = {Accessed April 4, 2010},

title = {Line Spacing in LaTeX documents},

author = {Murphy, Timothy I}

}

 

转载自：http://blog.csdn.net/techfield/article/details/19933589