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Referencing - BU Harvard 22-23 Full Guide: Author published more than one source in same year

Same author or authors with identical surname who have published more than one source in the same year

These are distinguished by adding lower case letters (a,b,c, etc.) after the year and within the brackets:

  • e.g. Johnson (2015a) discussed the subject…

Then the year and lower case letter remain noted together (e.g. 2015a) in the corresponding reference you add to the list at the end of your work.

If you have citations in the main text of your work with an identical author's name and year, the added lower case letters after the year determines ordering in your reference list at the end of your work e.g. a reference starting with Johnson, C., 2015a. would be listed before Johnson, C., 2015b.