It is essential to include sources from research when presenting as a group for several reasons. First, citing sources adds credibility to your presentation and demonstrates that you have done your homework and are knowledgeable about the topic. It also allows the audience to verify the information and follow up on any points of interest or disagreement. Secondly, proper attribution of sources is a sign of academic integrity and avoids plagiarism, which can result in serious consequences. Finally, citing sources allows you to acknowledge the work of others and provide a context for your own ideas and arguments, which can strengthen your presentation and contribute to a more informed and nuanced discussion of the topic.