Always follow the requirements of the job posting or norms of your industry, but 99.5% of the time listing references in your resume is a waste of space. Reviewers consider it filler.

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Be on the lookout for more details on my next visual novel "Robot Resources". It's coming out in October!

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Alt Text:
Edwin, an anthropomorphic jackrabbit, is wearing a business casual outfit and has a grumpy expression on his face. He gives job searching tips by speaking directly to the reader using a dialogue bubble. Edwin says,
"Do not list references on your resume unless it is required for the job. Even then, most application systems will ask for them separately later in the form. References take up valuable space that could be used to list job experience, include interesting projects, or give extra layout room between entries."