u/Busy-Advertising5676

forgot to cite and bibliography a source

I talked about a source (Dancy and Thoms) several times in my essay

every single time I mentioned them, I specifically stated their name in the body of the text (eg Dancy and Thoms partially agree with this notion...)

but I forgot to footnote them and bibliography them

what do I do

will I get a penalty

I am a first year undergrad

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