APA (7th ed.) Citation

Rhoads, A. F., & Block, T. A. (2007). The plants of Pennsylvania: An illustrated manual (Second edition.). University of Pennsylvania Press.

Chicago Style (17th ed.) Citation

Rhoads, Ann Fowler, and Timothy A. Block. The Plants of Pennsylvania: An Illustrated Manual. Second edition. Philadelphia: University of Pennsylvania Press, 2007.

MLA (9th ed.) Citation

Rhoads, Ann Fowler, and Timothy A. Block. The Plants of Pennsylvania: An Illustrated Manual. Second edition. University of Pennsylvania Press, 2007.