Deppman, Jed (2002). "'I Could Not Have Defined the Change': Rereading Dickinson's Definition Poetry". Emily Dickinson Journal. 11 (1): 49–80. doi:10.1353/edj.2002.0005. S2CID170669035.; Martha Dickinson Bianchi, The life and letters of Emily Dickinson (1924) p. 80 for quote
Michael Hancher, "Gazing at the Imperial Dictionary", Book History, Volume 1, 1998, pp. 156–181 doi:10.1353/bh.1998.0006
Deppman, Jed (2002). "'I Could Not Have Defined the Change': Rereading Dickinson's Definition Poetry". Emily Dickinson Journal. 11 (1): 49–80. doi:10.1353/edj.2002.0005. S2CID170669035.; Martha Dickinson Bianchi, The life and letters of Emily Dickinson (1924) p. 80 for quote