APA-viite (7. p.)
BUTLER, R. GLOBAL AGEING: CHALLENGES AND OPPORTUNITIES OF THE NEXT CENTURY.
Chicago-viite (17. p.)
BUTLER, R.N. GLOBAL AGEING: CHALLENGES AND OPPORTUNITIES OF THE NEXT CENTURY.
MLA-viite (9. p.)
BUTLER, R.N. GLOBAL AGEING: CHALLENGES AND OPPORTUNITIES OF THE NEXT CENTURY.
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