Pickering, Darby and Allday Ltd (PDA), was a British automobile manufacturer from 1912 to 1913. They built the PDA Cyclecar at their works in Birmingham, equipped with V2-engines from various manufacturers. Approximately 15 units were built.[1][2]
^Georgano, Nick (2001). The Beaulieu Encyclopedia of the Automobile. Vol. 3 P–Z. Fitzroy Dearborn. ISBN1-57958-293-1.[page needed]
^Linz, Harald; Schradee, Halwart (2008). Die Internationale Automobil-Enzyklopädie (in German). United Soft Media Verlag GmbH. ISBN978-3-8032-9876-8.[page needed]
David Culshaw & Peter Horrobin: The Complete Catalogue of British Cars 1895-1975. Veloce Publishing plc. Dorchester (1997). ISBN1-874105-93-6.[page needed]