Block, T. A., Rhoads, A. F., & Aniśko, A. (2011). Aquatic plants of Pennsylvania: A complete reference guide. University of Pennsylvania Press.
Citazione stile Chigago Style (17a edizione)Block, Timothy A., Ann Fowler Rhoads, e Anna Aniśko. Aquatic Plants of Pennsylvania: A Complete Reference Guide. Philadelphia: University of Pennsylvania Press, 2011.
Citatione MLA (9a ed.)Block, Timothy A., et al. Aquatic Plants of Pennsylvania: A Complete Reference Guide. University of Pennsylvania Press, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.