Think carefully about the sources you are finding and using. Apply the C.R.A.A.P. detection model.
* Currency - How recent is the information?
* Reliability - What kind of information is included in the resource? Is it balanced? Does the creator provide references or sources for data or quotations?
* Authority - Who is the creator or author? Who is the publisher or sponsor? What is the author's or publisher's interest (if any) in this information?
* Accuracy - Is the content readable? Is the content truthful? Is the content correct?
* Purpose/Point of View - Is this fact or opinion? Is the creator/author trying to sell you something; persuade you about something?
Although the guide linked below does not contain the academic sources that you will need for your presentation, it is a great source for your own general background and information. The "Historical Timelines" might be especially helpful.