Sierra Club. Upper Columbia River Group, Whitson, P., & Leon, R. (1987). Spokane trail guide #1. Sierra Club-Spokane Group.
Cita Chicago Style (17a ed.)Sierra Club. Upper Columbia River Group, Paula Whitson, y Rich Leon. Spokane Trail Guide #1. Spokane, Wash.: Sierra Club-Spokane Group, 1987.
Cita MLA (8a ed.)Sierra Club. Upper Columbia River Group, et al. Spokane Trail Guide #1. Sierra Club-Spokane Group, 1987.
Precaución: Estas citas no son 100% exactas.