Pulska, T., Pahkala, K., Laippala, P., & Kivelä, S. (1999). Follow up study of longstanding depression as predictor of mortality in elderly people living in the community. BMJ.
استشهاد بنمط شيكاغوPulska, Tuula, Kimmo Pahkala, Pekka Laippala, و Sirkka-Liisa Kivelä. "Follow Up Study of Longstanding Depression As Predictor of Mortality in Elderly People Living in the Community." BMJ 1999.
MLA استشهادPulska, Tuula, Kimmo Pahkala, Pekka Laippala, و Sirkka-Liisa Kivelä. "Follow Up Study of Longstanding Depression As Predictor of Mortality in Elderly People Living in the Community." BMJ 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.