Umm.. Any site ending in .Gov or .Edu
Encyclopedia
Books written in depth on the subject
Any written or spoken words from creditable people who study\mastered the subject
Hope this helps.
By explaining the great results of his proposal, he is preparing the reader to agree with him.
By writing that his proposal will end hunger and poverty, the reader is eager to hear his plan and is predisposed to agree with him. When the reader learns of his actual plan, however, the reader is moved to shock.
The overall effect is that other plans to end poverty and hunger -- which Swift dismisses as ineffective -- now appear more reasonable.