Many of the infographics you will find online do not include references to their sources. However, as a student you are responsible for meeting the citation standards specified by your instructor. Please clarify with your instructor if they would like you cite in-text, if the reference list needs to appear at the bottom of the infographic, and what format should those citations take before submitting your work.
You submitted an abstract, got accepted, did the research and created the infographic and now you stand beside your work waiting for a visitor or adjudicator to ask you about your research.
Tips for answering questions about your infographic (graciously provided by Anne Scrimger)