The document outlines three potential sources of stress: 1) Environmental factors such as economic and political uncertainty, and technological change, 2) Organizational factors like task demands, role demands, and interpersonal demands, and 3) Personal factors including family problems, economic problems, and personality traits. Environmental factors refer to external economic and political conditions that create uncertainty. Organizational factors involve work responsibilities and relationships that increase pressure. Personal factors comprise non-work life issues and individual characteristics that contribute to stress levels.