APA
PPL Conference Publication nr 14, . (1977). Electric vehicle development. International conference, London 31 May - 1 June 1977. London: PPL Conference Publication nr 14.
Chicago
PPL Conference Publication nr 14, . 1977. Electric vehicle development. International conference, London 31 May - 1 June 1977. London: PPL Conference Publication nr 14.
Harvard
PPL Conference Publication nr 14, . (1977). Electric vehicle development. International conference, London 31 May - 1 June 1977. London: PPL Conference Publication nr 14.
MLA
PPL Conference Publication nr 14, . Electric vehicle development. International conference, London 31 May - 1 June 1977. London: PPL Conference Publication nr 14. 1977.