Owing to the fact that a Living Reviews in Solar Physics article may evolve over time, we recommend to cite the article as follows:
Duncan Mackay and Anthony Yeates,
"The Sun's Global Photospheric and Coronal Magnetic Fields: Observations and Models",
Living Rev. Solar Phys. 9, (2012), 6. URL (accessed <date>):
The date given as <date> then uniquely identifies the version of the article you are referring to.