What are ‘sources of history’? List the different types of sources of history with examples.

Instructions:
Importance of checking the authenticity of the source
To avoid spreading false information

Solution:
A source of history has to be used while writing and understanding history.
Before using this source it is very important to verify its authenticity.
This is done in order to understand why, when and how the source was made/written/orated.
Just because a source looks old does not mean that it is authentic.
Multiple genuine documents have to be cross-checked and corroborated in order to authenticate the source.
This is done in order to spread false or incorrect information.
Thus it is very necessary to take precaution while using a source in order to study or write history.