Sierra Club. Upper Columbia River Group, Leon, R., Buckham, M. E., & Buckham, J. (1988). Spokane trail guide #2. Sierra Club-Spokane Group.
Style de citation Chicago (17e éd.)Sierra Club. Upper Columbia River Group, Rich Leon, M. E. Buckham, et Jim Buckham. Spokane Trail Guide #2. Spokane, Wash.: Sierra Club-Spokane Group, 1988.
Style de citation MLA (8e éd.)Sierra Club. Upper Columbia River Group, et al. Spokane Trail Guide #2. Sierra Club-Spokane Group, 1988.
Attention : ces citations peuvent ne pas être correctes à 100%.