In the Source Type field, select the source type applicable to how you heard about the job. For this example, we will select Careers.ohio.gov.Enter a detailed list of the job duties associated with this position in the Job Duties section. Application Guide. 11. The letter should be wellstructured and written in a formal style. Here's a general format for a job application letter for class 12 students:. 1> General Approach: Mention your overall focus or concentration during high school. You submit it with your resume to apply for jobs. A cover letter is a onepage document that highlights your qualifications and often accompanies your resume when you apply for jobs. Job Application and Bio-data Format Class 12.