I've not heard of ABS ratings, but other journal or article 'metrics' that are commonly used are the 'impact factor' and the 'H index'. (Google them)
Some people put an awful lot of emphasis on them. I view them with a certain degree of suspicion and would advise caution - you can get some rubbish published in high impact factor journals, while you will also find some really useful gems in more obscure publications.
At the end of the day, you should cite whatever is (i) relevant and (ii) good quality/reliable. I realise the latter is difficult to assess, particularly if you've just started, but the more you read, the better a feel you will get for it. If your uni offers any courses in critical appraisal of the literature, take them. For now, also ask your colleagues and peers for recommendations of journals to look at, but don't rule out good stuff from elsewhere.
If you tell us roughly what field you're in, we might be able to give some more specific advice.