A cikin watan Oktoba 1937 ya sami ciwon zuciya kuma ya mutu wata daya daga baya a gidansa, Hyme House, a Hampstead, London.A 1939, Hoton mai zane-zane. An wallafa littafin Life of Philip de László da Owen Rutter, wanda aka rubuta tare da de László. A shekara ta 2010, Yale University Press ta wallafa De László, His Life and Art by Duff Hart-Davis da Dr. Caroline Corbeau-Pons.
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