http://www.lds.org/conference/talk/display/0,5232,49-1-775-16,00.html
Scriptural Witnesses
Elder Russell M. Nelson
Of the Quorum of the Twelve Apostles
Scriptures of the Restoration do not compete with the Bible; they complement the Bible.
“I will define the term scriptural as pertaining to the Bible and the scriptures of the Restoration. Members of the Church ‘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.’ Scriptures of the Restoration also include the Doctrine and Covenants as well as the Pearl of Great Price.”