Owing to the fact that a Living Reviews in Relativity article may evolve over time, we recommend to cite the article as follows:
Massimo Tinto and Sanjeev V. Dhurandhar,
"Time-Delay Interferometry",
Living Rev. Relativity 8, (2005), 4. URL (cited on <date>):
http://www.livingreviews.org/lrr-2005-4
The date given as <date> then uniquely identifies the version of the article you are referring to.