There are a few different ways to format your resume. Choosing the best format for you will only make the resume writing process easier. When choosing a format, you should consider the job for which you are applying. Chronological, functional, and hybrid formatting styles each have specific purposes for the applicant.
However, this is a case where you’ll want to use your common sense. If you went to college for marketing and had a marketing internship your senior year, then worked as a server for the next several years, you would want to include your marketing internship.