APA (7th ed.) Citation

Pequignot, C. A. (1963). Tunnels and tunnelling. Hutchinson.

Chicago Style (17th ed.) Citation

Pequignot, Clifford Alfred. Tunnels and Tunnelling. [London]: Hutchinson, 1963.

MLA (9th ed.) Citation

Pequignot, Clifford Alfred. Tunnels and Tunnelling. Hutchinson, 1963.

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