The reference source that will be most helpful in this case is DOT Emergency Response Guidebook
What is an Emergency Response?
This refers to the help service that responds to emergencies that happen without warning and tries to save a life or prevent further damage.
Hence, we can see that in the case of an accident scene that involves an overturned truck that carries fuel and is spilled, the reference source that would best help would be the DOT Emergency Response Guidebook.
Read more about Emergency response here:
https://brainly.com/question/15095063
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