Answer:
I would say that the less helpful way to track sources for a research paper is to write source information on photocopies and Internet printouts.
Explanation:
I choose the last option because I think it is the less organized way to keep track of the sources and we can even lose some of them. The other options are more organized and will probably end up well, is more serious work, more formal. Source information is the key of a research paper, we have to be very careful with where we keep it.
