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PERRAUDIN, Frances. John Bercow's long journey from hard right to Labour darling. The Guardian (Londýn: Guardian News and Media Limited), 2019-09-09. Dostupné online [cit. 2019-10-19]. ISSN0261-3077.
MASON, Rowena. Race is on to replace John Bercow as Commons Speaker. The Guardian (Londýn: Guardian News and Media Limited), 2019-09-09. Dostupné online [cit. 2019-10-19]. ISSN0261-3077.