Não informado. (2022). Progress Report. Commonwealth of Pennsylvania, Department of Internal Affairs, Bureau of Topographic and Geologic Survey.
Chicago-Zitierstil (17. Ausg.)Não informado. Progress Report. Harrisburg, Pa: Commonwealth of Pennsylvania, Department of Internal Affairs, Bureau of Topographic and Geologic Survey, 2022.
MLA-Zitierstil (8. Ausg.)Não informado. Progress Report. Commonwealth of Pennsylvania, Department of Internal Affairs, Bureau of Topographic and Geologic Survey, 2022.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.