A cover letter is a must include paper along with a resume as it showcases all your skills which is not the part of your resume. There are many
cover letter writing service available which can help you in writing the most effective one and help formatting it. A cover letter include three paragraphs, first describes the reason why you are writing, middle paragraph describes what you have to offer, and the last part is the concluding part which describes how you’ll follow up. You can also add that your references are available on request in the end and if you have any portfolio, that too may be indicated.