II. Faith, thus receiving and resting on Christ and his righteousness, is the alone instrument of justification; yet is it not alone in the person justified, but is ever accompanied with all other saving graces, and is no dead faith, but worketh by love. - WCF 10.2
Resources
Faith & Justification by Theodore Beza
Justification - Salvation is By Grace through Faith by J. I. Packer
Of Justification by Faith by John Calvin
Justification by Faith by Louis Berkhof
Not Faith, but Christ by Horatius Bonar
Justification by Faith Alone by John Gerstner
Justification by Faith Alone by Joel Beeke
Justification and the Protestant Reformation by Carl Trueman
Multimedia
Justification By Faith Alone (YouTube) by Steven Lawson
Justification by Faith Alone (YouTube) by Michael Reeves
WCF 11.2: Faith and Saving Graces (MP3) by Jerusalem Chamber
Justification by Faith (MP3) by Voddie Baucham
Justification By Faith Alone (MP3) by R. C. Sproul
eBooks
The Doctrine of Justification (eBook) by James Buchanan
The Everlasting Righteousness (eBook) Horatius Bonar
The Doctrine of Justification by Faith (eBook) by John Owen
Of Justifying Faith (eBook) by Thomas Goodwin
Vindication of Justification (eBook) by Robert Traill