Which of the following is correct when the same author is cited for two papers published within the
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Which of the following is correct when the same author is cited for two papers published within the same year?
A.Ellis, 2019a; Ellis, 2019b
B.Ellis, 2019A; Ellis, 2019B
C.Ellis, 2019 (1); Ellis, 2019 (2)
D.Ellis, 2019-1; Ellis, 2019-2
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