APA (7th ed.) Citation

Williams, P. (1982). Snowdonia rock climbs / Paul Williams ; crag photographs by Snowdon Camera. Extreme.

Chicago Style (17th ed.) Citation

Williams, Paul. Snowdonia Rock Climbs / Paul Williams ; Crag Photographs by Snowdon Camera. Sheffield: Extreme, 1982.

MLA (9th ed.) Citation

Williams, Paul. Snowdonia Rock Climbs / Paul Williams ; Crag Photographs by Snowdon Camera. Extreme, 1982.

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