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Answered By: Natasha Skeen Last Updated: Jan 29, 2016 Views: 1323
You should use the publication date.
The reprint is simply when a publisher has initially published a fixed number of books, say 5000 and when they've all been sold they have to 'reprint' some more, which means the content is exactly the same as the original print run.
(This is different to a new edition where the text has been updated and so you have to use the new edition date not the original publication date.)