Penny, C., & Britain), I. o. C. E. (. (1996). Channel tunnel transport systems: Proceedings of the conference organized by the Instituion of Civil Engineers and held in London on 4-5 October 1994. London : Thomas Telford.
Chicago-čujuhus (17. p.)Penny, Charles, juo Institution of Civil Engineers (Great Britain). Channel Tunnel Transport Systems: Proceedings of the Conference Organized by the Instituion of Civil Engineers and Held in London on 4-5 October 1994. London : Thomas Telford, 1996.
MLA-čujuhus (9. p.)Penny, Charles, juo Institution of Civil Engineers (Great Britain). Channel Tunnel Transport Systems: Proceedings of the Conference Organized by the Instituion of Civil Engineers and Held in London on 4-5 October 1994. London : Thomas Telford, 1996.