APA (7th ed.) Citation

Twito, R. H., & Mann, C. N. (1979). Determining average yarding distance. Pacific Northwest Forest and Range Experiment Station, USDA Forest Service.

Chicago Style (17th ed.) Citation

Twito, Roger H., and Charles N. Mann. Determining Average Yarding Distance. Portland, Or: Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, 1979.

MLA (9th ed.) Citation

Twito, Roger H., and Charles N. Mann. Determining Average Yarding Distance. Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, 1979.