OnTarget8 (47), ALOR, archivado desde el original el 19 de febrero de 2011, consultado el 2 de enero de 2011.
books.google.com
Schwarz, Bill (2011), The White Man's World, p. 48, ISBN9780199296910, «So far as these can tell us anything, the opinion polls following the speech provide an indication of the scale of popular support. Gallup recorded 74 per cent, ORC 82 per cent, NOP 67 per cent, and the Express 79 per cent in favour of what Powell had proposed in Birmingham.».
Dumbrell, John (2001), A Special Relationship, pp. 34-35, ISBN9780333622490, «A Feb 1969 Gallup poll showed Powell the 'most admired person' in British public opinion».
Powell, John Enoch (1937). First Poems: Fifty Short Lyrics(en inglés). Printed at the Shakespeare Head Press and sold by B. Blackwell. Consultado el 15 de abril de 2021.
