Dr. Timothy H. Brubaker. Family Relationships in Later Life. SAGE.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDr. Timothy H. Brubaker. Family Relationships in Later Life. SAGE.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDr. Timothy H. Brubaker. Family Relationships in Later Life. SAGE.
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