Hi,
When you said the third person is recommended, you were referring to 'one', right? Yes. Or, instead of things like 'I believe that . . . ', you can say for example 'Some people believe that . . . '.
Also, I was wondering if you know of any good book or guide that I could refer to about things like this? I'm not familiar with such guides myself, although there are plenty around. Here is a list of some, and some discussion of them.
http://en.wikipedia.org/wiki/Style_guideBest wishes, Clive