APA (7th ed.) Citation

Aho, P. E., & Hadfield, J. S. (1975). How to estimate defect in white fir in southwest Oregon. Pacific Northwest Forest and Range Experiment Station, Forest Service, USDA.

Chicago Style (17th ed.) Citation

Aho, Paul E., and James S. Hadfield. How to Estimate Defect in White Fir in Southwest Oregon. [Portland, Or.]: Pacific Northwest Forest and Range Experiment Station, Forest Service, USDA, 1975.

MLA (9th ed.) Citation

Aho, Paul E., and James S. Hadfield. How to Estimate Defect in White Fir in Southwest Oregon. Pacific Northwest Forest and Range Experiment Station, Forest Service, USDA, 1975.