Al Zahrani، M. I. S.، و Hawkins، B. D. (1994). A Study of the Relationship Between Social Interaction and Life Satisfaction Among Noninstitutionalized Elderly Men in Saudi Arabia (رسالة دكتوراه غير منشورة). Howard University، واشنطن. مسترجع من http://search.mandumah.com/Record/616346
Al Zahrani، Mohammed Ibn Said، و Brin D. Hawkins. "A Study of the Relationship Between Social Interaction and Life Satisfaction Among Noninstitutionalized Elderly Men in Saudi Arabia" رسالة دكتوراه. Howard University، واشنطن، 1994. مسترجع من http://search.mandumah.com/Record/616346