Gaya APA
ERIK ECKHOLM, KATHLEEN NEWLAND. ().
WORLDWATCH PAPER 10 .
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Gaya Chicago
ERIK ECKHOLM, KATHLEEN NEWLAND.
WORLDWATCH PAPER 10.
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Gaya MLA
ERIK ECKHOLM, KATHLEEN NEWLAND.
WORLDWATCH PAPER 10.
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Gaya Turabian
ERIK ECKHOLM, KATHLEEN NEWLAND.
WORLDWATCH PAPER 10.
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