Several authors with the same surname

When you cite several sources with same name authors and the year of publication is the same, add the author’s first name initial in the in-text citation also to distinguish them:

In-text citation

 Johansson (2017) and A. Johansson (2019) reported that…

Two studies (Johansson, R. 20217; Johansson, A. 2019) show that…

Reference list

 Johansson, A. (2019). Title of the book. Place of publication: Publisher.

Johansson, R. (2017). Title of the book. Place of publication: Publisher.