The answer to your question is the third, fifth, and eighth sentence.
Sourcing is finding out where something/someone can be obtained
what steps has Gatsby taken to ensure this reunion day is perfect?
He's had way too many flowers delivered, had Nick's lawn mowed, and is wearing a white suit with silver shirt and gold tie.
Hopes this helps :)
<span>He is surprised by the question and says that owning books is against the law.</span>
