1. Thomas H. Johnson. The Complete Poems of Emily Dickinson, (Delhi, Kalyani Publishers, 1910)
2. William Wordsworth, Ode to Immortality, Stanza XI, lines 16-17.
3. George F. Whicher, This was a Poet: A Critical Biography of Emily Dickinson. (The University of Michigan Press, 1960)
4. Ruth Flanders McNaughton, The Imagery of Emily Dickinson (Lincoln,Nebraska: University of Nebraska, 1949)