Owing to the fact that a Living Reviews in Relativity article may evolve over time, we recommend to cite the article as follows:
Luc Blanchet,
"Gravitational Radiation from Post-Newtonian Sources and Inspiralling Compact Binaries",
Living Rev. Relativity 9, (2006), 4. URL (accessed <date>):
http://www.livingreviews.org/lrr-2006-4
The date given as <date> then uniquely identifies the version of the article you are referring to.