The Development of the Canon of the New Testament
By Glenn Davis: excellent web site providing several pages of material on the formation of the canon including introductory essays, a Cross Reference Table of the status of individual books among the early writers; Early Lists of the Books of the New Testament and a piece on Apocryphal New Testament Writings. The information is based largely on Metzger but also on Schneemelcher and others. It is clear, well presented and the ideal place to begin your on-line research on the New Testament canon.

How the Books of the Bible Were Chosen
Attractively presented introductory material on the formation of the canon from The Bible: The Book that Bridges the Millennia web site. An ideal starting point on the subject.

F. F. Bruce, “The Canon of the New Testament”, Chapter 3 in The New Testament Documents: Are They Reliable? (5th edition; Leicester: Intervarsity Press, 1959), reproduced at The World Invisible: Christian Corps Book Catalogue.

Richard Heard, “How the Books of the New Testament Were Selected”, Chapter 2 in An Introduction to the New Testament (New York: Harper & Brothers, 1950), reproduced on Religion-Online.

Robert M. Grant, “What the New Testament Consists Of -- The Canon”, Chapter 1 in A Historical Introduction to the New Testament (New York: Harper & Row, 1963), reproduced on Religion-Online.

Roy W. Hoover, “How the Canon Was Formed”, The Fourth R 5, 1 (January/February 1992)

George G. Reid, “Canon of the New Testament”, article in the Catholic Encyclopaedia Volume 3 (1908)

Stephen Voorwinde, “The Formation of the New Testament Canon”, Vox Reformata 60 (1995)

H.J. de Jonge “The Canons of the New Testament”, in J.-M. Auwers & H.J. de Jonge (eds.), The Biblical Canons (Bibliotheca Ephemeridum Theologicarum Lovaniensium 163; Leuven: University Press & Peeters, 2003): xxii-xxxii.

Lee Martin McDonald, “The Integrity of the Biblical Canon in Light of Its Historical Development”, Bulletin of Biblical Research 6 (1996): 95-132 (New)