Ralph Waldo Emerson, Robert Ernest Spiller, Alfred Riggs Ferguson, Joseph Slater, Jean Ferguson Carr (1971). “The Collected Works of Ralph Waldo Emerson: Essays, second series”, p.128, Harvard University Press
Edmund Spenser, John Aikin (1810). “The poetical works of Edmund Spenser ... from the text of J. Upton. With a preface, biographical and critical, by J. Aikin”, p.162