If you're going to do a bunch of them in batch, probably downloading the GO ontology release (http://geneontology.org/page/download-ontology) and then extracting out the information you want through a small script would be the best way.
If you have few enough you can do them by hand, I would say just go through AmiGO 2 (http://amigo.geneontology.org/amigo).
I would still ask you to be a bit more descriptive with your question and tell us what you intend to perform and what have you tried till now. It would be easier for others to help you out.
Note: Search Google with GO Term association. A lot of hits will turn with Biostars.