What pages are the Volturi in new moon?

In "New Moon" by Stephenie Meyer, the Volturi are introduced during the latter half of the book, particularly in chapters 19 and 20. They play a significant role in the climax when Bella is confronted by them in Volterra, Italy. Their presence is crucial to the plot as they represent the authoritative force in the vampire world. The specific page numbers may vary by edition, so it's best to check the chapters mentioned for detailed context.