John Keats (2015). “The Complete Poetry of John Keats: Ode on a Grecian Urn + Ode to a Nightingale + Hyperion + Endymion + The Eve of St. Agnes + Isabella + Ode to Psyche + Lamia + Sonnets and more from one of the most beloved English Romantic poets”, p.103, e-artnow
Jane Campion, John Keats (2009). “So Bright and Delicate: Love Letters and Poems of John Keats to Fanny Brawne: Love Letters and Poems of John Keats to Fanny Brawne”, p.24, Penguin UK
John Keats (2015). “John Keats - The Man Behind The Lyrics: Life, letters, and literary remains: Complete Letters and Two Extensive Biographies of one of the most beloved English Romantic poets”, p.307, e-artnow