Answer:
Research studies, Case studies, Books, Information from organization's database.
Step-by-step explanation:
The secondary sources are defined as the sources that is used to describe or summarize or discuss the information and the details which is originally presented in the other sources. It provides a good overview of the topic or the subject that we are studying or doing a research.
Some of the secondary researches during a research process are :
Research studies, Case studies, Books, Information from organization's database.