Which of the following is an example of gray literature?

Question

Quizplus · Accepted Answer

Gray literature describes a variety of publications that are neither published in scholarly sources nor peer-reviewed, but that are nonetheless considered to be academically sound because they are not supported by commercial interests or advertisers. Documents that analyze the advantages and disadvantages of one or more approaches to a specific problem are referred to as white papers and a "wiki" is a kind of software program used to allow participants to easily produce and publish content on a website.

Which of the Following Is an Example of Gray Literature