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APA (7th ed.) Citation
(1981). Science year :1981: The World book science annual. Field Enterprises Educational Corporation.
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Chicago Style (17th ed.) Citation
Science Year :1981: The World Book Science Annual. Chicago: Field Enterprises Educational Corporation, 1981.
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MLA (9th ed.) Citation
Science Year :1981: The World Book Science Annual. Field Enterprises Educational Corporation, 1981.
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