Breck, S. (1818). Sketch of the internal improvements already made by Pennsylvania: With observations upon her physical and fiscal means for their extension; particularly as they have reference to the future growth and prosperity of Philadelphia. J. Maxwell, Printer.
Παραπομπή σε μορφή Chicago (17η εκδ.)Breck, Samuel. Sketch of the Internal Improvements Already Made by Pennsylvania: With Observations upon Her Physical and Fiscal Means for Their Extension; Particularly as They Have Reference to the Future Growth and Prosperity of Philadelphia. Philadelphia: J. Maxwell, Printer, 1818.
Παραπομπή σε μορφή MLA (8th εκδ.)Breck, Samuel. Sketch of the Internal Improvements Already Made by Pennsylvania: With Observations upon Her Physical and Fiscal Means for Their Extension; Particularly as They Have Reference to the Future Growth and Prosperity of Philadelphia. J. Maxwell, Printer, 1818.