There are two types of resources primary and secondary sources.
Explanation:
Primary sources provide the first hand information. They are first hand documents mostly eye witness records on a subject. People give first hand information of the past with supportive evidences which is considered to be the primary source of researching a subject.
Secondary sources are information that is taken from the factual documents which are primary sources. They are second hand accounts of a person or a subject that is published and it provides additional information about the primary resources. Secondary sources analyse and interpret the factual validity of the primary source. Both these sources serve to be important in conducting any research. Be it scientific or historical.
