Wilkerson selects specific sources because they can provide accurate information about what she wants to present. Therefore, the general structure of the book is in line with the author's objectives and presents a logical and efficient sequence of information.
When an author selects research sources for his/her text, these sources must be specific, that is, they must be documents that specifically address the subject that the author wishes to present in his/her text.
This allows the author to maintain a coherent and efficient structure capable of presenting the subject in a direct, accurate, and objective way.
You didn't show the book that this question refers to, which prevents me from providing an accurate answer, but I hope the above information can help you.
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https://brainly.com/question/26044896