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Assuming it's an academic paper, it's perfectly fine to just add the number to the quote. The number will redirect the reader to the full source, presumably at the bottom of your page or in your ...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/43036 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/43036 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
Assuming it's an academic paper, it's perfectly fine to just add the number to the quote. The number will redirect the reader to the full source, presumably at the bottom of your page or in your bibliography section. You already "introduced" the author in the previous citation, no need to do it twice.