Sources list for BLAKE SONGS OF INNOCENCE:

Oxford University Press, "William Blake Songs of Innocence and of Experience"
The Poetry of William Blake

Bloom, Harold. Modern Critical Interpretations William Blake's Songs of Innocence and Experience. New York: Chelsea House Publishers.1987. 7-10.
"London" by William Blake

Gerry Ellis, Wessex Publications, "The Songs of Innocence and Experience by William Blake- An A Level English Workbook
The Poetry of William Blake

Blake, William, and Alfred Kazin. "Songs of Innocence and of Experience." The Portable Blake : Selected and Arranged with an Introduction by Alfred Kazin. Ed. Alfred Kazin. New York: Penguin Books, 1976. 83-118.
Voltaire and Blake: Against Religion

Blake, William. (1991). Songs of Innocence and of Experience. Ed. Andrew Lincoln. From Blake's Illuminated Books, Vol. 2, General Ed. David Bindman. Princeton: Princeton University Press and The William Blake Trust.
William Blake