While you haven't mentioned the context of the citation, AFAIK, reproducing someone's graphical artifacts usually requires not only proper citation, but, first and foremost, permission from the copyright holder (author or, likely, publisher) to reproduce the artifact with or without modifications.
What it practically means is that you will need to add the following (or similar) phrase to a caption: "Copyright ... Reproduced with permission" (alternatively, if the artifact has been modified, instead of "reproduced", use word "adapted"). If a permission has not yet been received, but the request has been submitted, you should add "[pending]" after the word "permission" (this is sufficient most likely only for working papers or submissions like a revision of a thesis/dissertation). Please take a look at my relevant answer for full citation example and other details.