Mormonism (The Church of Jesus Christ of Latter-day Saints) - Is it Christian? (page 4)
Mormonism says: The Mormon church uses the Bible and the Book of Mormon as their primary authority, with the addition of the Doctrine and Covenants and The Pearl of Great Price.
We believe the Bible to be the word of God, as far as it is translated correctly; we also believe the Book of Mormon to be the word of God. —Articles of Faith, 8.
The LDS “Living Prophet” can speak oracles which actually supercede scripture and any previous prophet's oracles, including Joseph Smith. The Bible holds the least amount of authority in the Mormon church.