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Owen, G.  (2009, January 08). Ryder, Sydney Franklin Thomas [Don], Baron Ryder of Eaton Hastings (1916–2003), journalist and industrialist. Oxford Dictionary of National Biography. Retrieved 23 Jan. 2021, from https://www.oxforddnb.com/view/10.1093/ref:odnb/9780198614128.001.0001/odnb-9780198614128-e-90001.

Owen, Geoffrey. "Ryder, Sydney Franklin Thomas [Don], Baron Ryder of Eaton Hastings (1916–2003), journalist and industrialist." Oxford Dictionary of National Biography.  January 08, 2009. Oxford University Press. Date of access 23 Jan. 2021, <https://www.oxforddnb.com/view/10.1093/ref:odnb/9780198614128.001.0001/odnb-9780198614128-e-90001>

Owen, Geoffrey. "Ryder, Sydney Franklin Thomas [Don], Baron Ryder of Eaton Hastings (1916–2003), journalist and industrialist." Oxford Dictionary of National Biography. 4 Jan. 2007; Accessed 23 Jan. 2021. https://www.oxforddnb.com/view/10.1093/ref:odnb/9780198614128.001.0001/odnb-9780198614128-e-90001.