Beckham, S. D. (1978). Identifying and assessing historical cultural resources: Region 6, U.S.F.S. Forest Service, USDA, Pacific Northwest Region.
Цитирование в стиле Чикаго (17-е изд.)Beckham, Stephen Dow. Identifying and Assessing Historical Cultural Resources: Region 6, U.S.F.S. [Portland, Or.]: Forest Service, USDA, Pacific Northwest Region, 1978.
Цитирование MLA (8-е изд.)Beckham, Stephen Dow. Identifying and Assessing Historical Cultural Resources: Region 6, U.S.F.S. Forest Service, USDA, Pacific Northwest Region, 1978.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.