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 to cite in-text,
• if the reference list needs to appear at the bottom of the infographic, and
• what format those citations should take before submitting your work.

Get more information from the MRU Guide to Visual and Verbal Citation.