APA (7th ed.) Citation

Gupton, O. W., & Swope, F. C. (1981). Trees and shrubs of Virginia. University Press of Virginia.

Chicago Style (17th ed.) Citation

Gupton, Oscar W., and Fred C. Swope. Trees and Shrubs of Virginia. Charlottesville: University Press of Virginia, 1981.

MLA (9th ed.) Citation

Gupton, Oscar W., and Fred C. Swope. Trees and Shrubs of Virginia. University Press of Virginia, 1981.