How was the priesthood restored?
The priesthood was restored to Joseph Smith by the laying on of hands by those who held it anciently. In May 1829, John the Baptist restored the Aaronic Priesthood, and shortly thereafter, Peter, James, and John, three of the Savior’s original Apostles, restored the Melchizedek Priesthood. On April 3, 1836, Moses, Elijah, and Elias restored additional priesthood keys.
The text from the handsouts where found in the lesson, https://www.lds.org/youth/learn/yw/apostasy-restoration/restored?lang=eng this talk https://www.lds.org/general-conference/2005/04/our-most-distinguishing-feature?lang=eng and the Articles of Faith https://www.lds.org/scriptures/pgp/a-of-f/1.5?lang=eng#4{module Helpful Pages!}