Absolute rubbish. The OP is asking "Who has Brad Hudson coached?" What do you consider a legitimate source to answer that question? The New York Times? The ignorant scribblings from Gina Kolata? Please, edify me, REAL English Teacher?
The OP has the best resource in the world available to him right here. It's free and he doesn't have to leave home to get that information. Someone will have the answer.
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Oh, how about Running Times magazine? Runners' World magazine? Both sources (however much people on this site would like to bash them) have a legitimacy that can’t be found on an anonymous message board.
(By the way, The New York Times article on Alberto Salazar would be considered a “better source” [in the academic sense] than information you posted on a website. Albeit, if someone conducted a personal interview with you, Malmo, then that’s a different story.)
In research, one must recognize the 4 “R’s”:
1.) Is your source relevant? (Does it relate to your paper?)
2.) Is your source reliable? (What is the source? Where did it come from?)
3.) Is your source recent? (The more recent, the better!)
4.) Is your source representative? (Does it show a balance [both sides of the argument]?)
Now, does this site answer those 4 questions? Probably not. This site is a good site for INFORMAL & BIASED information.
And, just for the record, depending on the class, a research paper on Brad Hudson—without a real focus--probably isn’t that good of a topic either.