APA (7th ed.) Citation

SHIGO. (1979). Tree decay: An expanded concept. United States department of Agriculture, Forest Service.

Chicago Style (17th ed.) Citation

SHIGO. Tree Decay: An Expanded Concept. Washington: United States department of Agriculture, Forest Service, 1979.

MLA (9th ed.) Citation

SHIGO. Tree Decay: An Expanded Concept. United States department of Agriculture, Forest Service, 1979.

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