citations needed?!

<p>i am writing an essay about a controversial issue and my stance on it. I chose fetal tissue. I did a research paper last year, so I used lots of info from that paper. Should i include the citations? My english teacher recommended it, as well as a works cited.</p>

<p>Also, would not using the word "I" make for a more elevated writing style? Or would it just make my opinion unclear?</p>