APA (7th ed.) Citation

Barrett, J. W. (1968). Pruning of ponderosa pine: Effect on growth. Pacific Northwest Forest and Range Experiment Station, USDA Forest Service.

Chicago Style (17th ed.) Citation

Barrett, James W. Pruning of Ponderosa Pine: Effect on Growth. Portland, Or: Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, 1968.

MLA (9th ed.) Citation

Barrett, James W. Pruning of Ponderosa Pine: Effect on Growth. Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, 1968.

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