^Reed, Philip; Cooke, Mervyn (2010). Letters From A Life: The Selected Letters of Benjamin Britten, Vol. 5 1958–1965. Boydell Press. ISBN978-1-84383-591-2., p. 85
^Roberts, David (2006). British Hit Singles & Albums (19th ed.). London: Guinness World Records. p. 595. ISBN1-904994-10-5.