Even though they both are about the same topic, they're kind of different. "Clay refuses army oath" is a newspaper article and it only talks about what was happening at that present moment not about what happened afterwards like in the other article. The other one is more detailed and ties into other important political figures at the time like Malcolm X and Martin Luther King Jr.
I will continue my research but in the meantime i think the sources i got so far are good enough. Would you have any recommendations on the topic of Muhammad Ali in the library resource center with full texts that i can use? or are we allowed to also use sources outside the library except wikipedia?