How do I reference 2 or 3 different articles written by the same author and published in the same year, in Harvard?
Sources published by the same author in the same year - are listed alphabetically by the title of the work and a lower-case letter (a, b, c, ...) is added immediately after the date, in both the reference list and in-text citations.
For example:
Campbell and Shiller (1988b) find that E/P ratios, especially when past
earnings (E) are averaged over 10-30 years, …
… Campbell and Shiller (1988a) attempt to move the volatility tests in this direction.
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