Sierra Club. Upper Columbia River Group, Leon, R., Buckham, M. E., & Buckham, J. (1988). Spokane trail guide #2. Sierra Club-Spokane Group.
Cita Chicago Style (17a ed.)Sierra Club. Upper Columbia River Group, Rich Leon, M. E. Buckham, y Jim Buckham. Spokane Trail Guide #2. Spokane, Wash.: Sierra Club-Spokane Group, 1988.
Cita MLA (8a ed.)Sierra Club. Upper Columbia River Group, et al. Spokane Trail Guide #2. Sierra Club-Spokane Group, 1988.
Precaución: Estas citas no son 100% exactas.