Noodletools is the citation machine we use at ODSS. Many students choose to use another citation generator. As long as the format follows the expectation of the teachers you may be fine.
We suggest Noodletools because it always is uses the most up to date MLA and APA guides, and is very robust. When you graduate, Noodletools also offers grads a discount on their service as you move to post secondary education.
Noodletools has made some significant changes. I've updated a simple version of the noodletools guide to reflect that. Below that is an older version that might still help you with adding databases (until I get around to editing that as well).