I worked at the same company for 4 years as a summer job between November and January on every year. I am graduating and I would like to write it into my CV/Resume because I don't really have a rich work experience in other area and the skills that I learnt from there are particular useful and relevant to the career that I want to get in.
Would it be inappropriate to just put 2013-2017 in my work experience ?
What is the most suitable way to express this ?