Hi, as I know you should not cite the authors if you already include them in the sentence. But if I do not cite the study then it will not show in the reference list (I am using Zotero). How do I solve this dilemma? Here is an example:
"Martin and Randal (2008) found that donation boxes with higher bills harnessed larger donation amounts (Martin & Randal, 2008)."
So "Martin and Randal (2008)" is mentioned in the sentence itself and citation at the end is not needed. But if I do not cite then it will not be shown in the reference list.