Question: what are verbs of attribution?
Answer: When you write about what other people say, you might use the verb “says,” as in this statement: The author says that only six reindeer pull Santa's sleigh. “Says” is a verb of attribution; it means that you are quoting, paraphrasing, or referring to another source. ... 
accepts. believes. ... 
affirms. concurs with. ... 
counters.