The Bible makes it clear:
 Salvation is by Christ alone - Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved. (Acts 4:12) 
Salvation is by Grace alone
- For by grace are ye saved through faith; and that not of yourselves: it is the gift of God. Not of works, lest any man should boast. (Ephesians 2:8-9)
Salvation is by Faith alone
- Therefore being justified by faith, we have peace with God through our Lord Jesus Christ. (Romans 5:1)