APA (7th ed.) Citation

Sierra Club. Upper Columbia River Group, Whitson, P., & Leon, R. (1987). Spokane trail guide #1. Sierra Club-Spokane Group.

Chicago Style (17th ed.) Citation

Sierra Club. Upper Columbia River Group, Paula Whitson, and Rich Leon. Spokane Trail Guide #1. Spokane, Wash.: Sierra Club-Spokane Group, 1987.

MLA (8th ed.) Citation

Sierra Club. Upper Columbia River Group, et al. Spokane Trail Guide #1. Sierra Club-Spokane Group, 1987.

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