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Kormanik, Paul P. "Liquidambar styraciflua L. – Sweetgum"Archived 11 July 2015 at the Wayback Machine from Silvics of North America: Volume 2:Hardwoods. Agriculture Handbook 654. U.S. Department of Agriculture, Forest Service, Washington, D.C. 1965
Kormanik, Paul P. "Liquidambar styraciflua L. – Sweetgum"Archived 11 July 2015 at the Wayback Machine from Silvics of North America: Volume 2:Hardwoods. Agriculture Handbook 654. U.S. Department of Agriculture, Forest Service, Washington, D.C. 1965