I think that Mignon Fogarty is great. If you don’t know who she is you should really check out her work on Grammar Girl. She does a humorous take on modern grammar errors that are intelligent, well presented, and easy to remember. There is also a Grammar Girl podcast so you might want to check that out, too.
The reason that I decided to post about Grammar Girl today was due to a recent question I had concerning double quotes. You see them all over the place and since the intended use that I had seemed a little offer I thought that I would check GG and see if she had a definitive reference for me. Ok, I am going to be honest I was pretty sure that I had read a guide from Grammar Girl that discussed the proper usage but I forgot what they all were. At least I wasn’t sure if they were “correct” in my particular use case. The usage of the double quotes around correct in the previous sentence are wrong. They would mean in that case incorrect which in my case they were.
If you are interested in seeing why you would fall through a test on 7th grade grammar you can take a look at what she has to offer. When you’re looking for the proper usage of double quotes you will want to read this page: http://www.quickanddirtytips.com/education/grammar/single-quotation-marks-versus-double-quotation-marks