International Speleological Congress, Atkinson, T. C., & Smart, P. L. (1977). Caves and karst of southern England and South Wales: Guidebook for the International Congress of Speleology at Sheffield, 1977. 7th I.S.C. Committee ; [Distributed by] British Cave Research Association.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)International Speleological Congress, T. C. Atkinson, và P. L. Smart. Caves and Karst of Southern England and South Wales: Guidebook for the International Congress of Speleology at Sheffield, 1977. [Great Britain] : Bridgwater (BCRA Sales, 30 Main Rd, Westonzoyland, Bridgwater, Somerset): 7th I.S.C. Committee ; [Distributed by] British Cave Research Association, 1977.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)International Speleological Congress, et al. Caves and Karst of Southern England and South Wales: Guidebook for the International Congress of Speleology at Sheffield, 1977. 7th I.S.C. Committee ; [Distributed by] British Cave Research Association, 1977.