APA (7th ed.) Citation

Smith, W. P. H., Hart, H. C., & Carr, E. (2011). Climbing in The British Isles, Vol. II Wales and Ireland. Project Gutenberg.

Chicago Style (17th ed.) Citation

Smith, W. P. Haskett, H. C. Hart, and Ellis Carr. Climbing in The British Isles, Vol. II Wales and Ireland. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Smith, W. P. Haskett, et al. Climbing in The British Isles, Vol. II Wales and Ireland. Project Gutenberg, 2011.

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