APA (7th ed.) Citation

International Speleological Congress, Trudgill, S. T., & Brack, E. V. (1977). A Bibliography of British karst, 1960-1977. Geo Abstracts Ltd..

Chicago Style (17th ed.) Citation

International Speleological Congress, S. T. Trudgill, and E. V. Brack. A Bibliography of British Karst, 1960-1977. Norwich: Geo Abstracts Ltd., 1977.

MLA (8th ed.) Citation

International Speleological Congress, et al. A Bibliography of British Karst, 1960-1977. Geo Abstracts Ltd., 1977.