Which of the following would not be considered primary source material?
A. A 1906 newspaper article of the San Francisco earthquake of that time period B. The results of a study presented by the researchers of the effectiveness of a cancer drug C. A Chapter in a book that discusses various economic theories
The only one of these three options that can be considered primary source material is the newspaper account given at the time. This contemporaneous article may not be totally accurate, but the journalist will have been in the best position to check facts and report information while it is fresh.
A chapter in a book will be drawing upon information of all sources, much of it secondary such as opinions in articles, correspondence, and at the end of his study, the writer is aiming at formulating a theory. In the case of the researchers, they are reporting upon results from experimentation rather than describing appearances, incidents, events at first hand.