Portfolio. Cobham, Surrey, UK: Brooklands Books, No year cited. ISBN 0-948207-89-2. Clayton, Donald C. Handley Page: An Aircraft Album. Shepperton, Surrey, UK:
Series. Cobham, Surrey, UK: Brooklands Books. ISBN 0948207876. ——————, ed. (1986). On Audi & Auto Union 1980-1986. Road & Track Series. Cobham, Surrey, UK: