APA (7th ed.) Citation

Engel, C. E. (1971). Mountaineering in the Alps : an historical survey / by C.E. Engel: An historical survey (New ed.). Allen and Unwin.

Chicago Style (17th ed.) Citation

Engel, C. E. Mountaineering in the Alps : An Historical Survey / by C.E. Engel: An Historical Survey. New ed. Allen and Unwin, 1971.

MLA (9th ed.) Citation

Engel, C. E. Mountaineering in the Alps : An Historical Survey / by C.E. Engel: An Historical Survey. New ed. Allen and Unwin, 1971.

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