A cover letter lets you tell your employment story with some freedom to express yourself. You can explain your qualifications more fully.A referral cover letter is a job application document that mentions a mutual contact you share with the hiring manager. Ohio Reference Letter Template. A Reference Letter is used to endorse the skills and positive traits of a job or college applicant. Just write your address where you can be reached. Cover letters should complement your résumé and illustrate your interests, the skills you possess, and your communication abilities. Cover letters aren't even mentioned in the application. I'm going to share with you the three part structure to create a bulletproof cover letter that gets you more interviews. Also, indicate why you are contacting the person.