United States. Forest Service. Pacific Northwest Region, Westway Recording, Portland, Or, & Morton, S. L. Without a trace: The wilderness challenge.
Chicago Style (17th ed.) CitationUnited States. Forest Service. Pacific Northwest Region, Portland Westway Recording, and Steve L. Morton. Without a Trace: The Wilderness Challenge.
MLA (8th ed.) CitationUnited States. Forest Service. Pacific Northwest Region, et al. Without a Trace: The Wilderness Challenge.
Warning: These citations may not always be 100% accurate.