What should be done when collecting materials for a presentation?

When preparing materials for a presentation, citing reference sources is crucial. This practice enhances the credibility of your presentation, as it provides a foundation of trustworthiness and reliability. By citing sources, you acknowledge the origin of the information, giving credit to the authors and researchers who contributed to your understanding of the topic. This not only reinforces your arguments but also allows your audience to seek out further information if they wish. Additionally, citing sources helps to avoid plagiarism, which is an important ethical consideration in any academic or professional setting.

The other options lack the same level of rigor or ensure the audience's trust. Relying solely on personal experiences might not provide a comprehensive or objective view. Limiting references to only online sources can lead to a lack of variety and potentially biased information based on what is available online. Using only media resources could also result in an incomplete representation of a topic, as it may not cover scholarly perspectives or in-depth analyses necessary for a well-rounded presentation.