Don’t worry about the formatting of the references, I’ve fixed them. It would be cool to find some resources that the ones around frequently mention - like the law itself, the commitee discussions leading to it; and Roosevelt’s letter about Sinclair, where (according to one claim) he says he was "useful’.
In general though, I’m not sure if “Meat packing” is the best title for the page - how about “Meat packing in the US”, since the page only applies to that topic, and only to one specific event?
As for the win, don’t beat yourself up. Will you take part in the next contest?
Hey, question. While looking for more sources to improve articles on the Wiki I’d like to be able to store them on the Wiki. Can I add a section along the lines of “Material to be added in?”
Well, you can easily use the Links section of the page and later simply take a link out of there. Alternatively, the Talk pages are eminently useful for that sort of thing (especially if you want to comment about what to include, what not, etc.) - and somebody else may also pick that up and use it.