APA (7th ed.) Citation

British Mountaineering Council. Peak Committee, Ballard, J., & Marshall, E. (1981). Derwent Valley / editors Jim Ballard and Ernie Marshall. Peak Committee of the British Mountaineering Council distributor ; Cordee.

Chicago Style (17th ed.) Citation

British Mountaineering Council. Peak Committee, Jim Ballard, and Ernie Marshall. Derwent Valley / Editors Jim Ballard and Ernie Marshall. (Manchester) : Leicester: Peak Committee of the British Mountaineering Council distributor ; Cordee, 1981.

MLA (9th ed.) Citation

British Mountaineering Council. Peak Committee, et al. Derwent Valley / Editors Jim Ballard and Ernie Marshall. Peak Committee of the British Mountaineering Council distributor ; Cordee, 1981.

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