APA (7th ed.) Citation

Não informado. (1969). Tunnels and Tunnelling. Morgan Grampian.

Chicago Style (17th ed.) Citation

Não informado. Tunnels and Tunnelling. London: Morgan Grampian, 1969.

MLA (8th ed.) Citation

Não informado. Tunnels and Tunnelling. Morgan Grampian, 1969.

Warning: These citations may not always be 100% accurate.