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"A Christmas Carol"(Web). Encyclopædia Britannica. Encyclopædia Britannica, inc. 6 June 2014. Archived from the original on 27 August 2018. Retrieved 27 August 2018.
cambridge.org
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"past"(Web). dictionary.cambridge.org. Cambridge.org. Archived from the original on 27 August 2018. Retrieved 27 August 2018.
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"past"(web article). Dictionary.com. Archived from the original on 26 June 2018. Retrieved 25 June 2018.
Collins, Philip (5 June 2018). "Charles Dickens"(Web). Encyclopædia Britannica. Encyclopædia Britannica, inc. Archived from the original on 18 June 2018. Retrieved 27 August 2018.
"A Christmas Carol"(Web). Encyclopædia Britannica. Encyclopædia Britannica, inc. 6 June 2014. Archived from the original on 27 August 2018. Retrieved 27 August 2018.