APA (7th ed.) Citation

International Speleological Congress Sheffield, England, & Ford, T. D. (1977). Proceedings of the 7th International Speleological Congress, Sheffield, 1977. British Cave Research Association.

Chicago Style (17th ed.) Citation

International Speleological Congress Sheffield, England, and Trevor David Ford. Proceedings of the 7th International Speleological Congress, Sheffield, 1977. Bridgwater: British Cave Research Association, 1977.

MLA (8th ed.) Citation

International Speleological Congress Sheffield, England, and Trevor David Ford. Proceedings of the 7th International Speleological Congress, Sheffield, 1977. British Cave Research Association, 1977.