Florin, J. W. (1977). The advance of frontier settlement in Pennsylvania, 1638-1850: A geographic interpretation. Dept. of Geography, Pennsylvania State University.
Chicago Style (17th ed.) CitationFlorin, John William. The Advance of Frontier Settlement in Pennsylvania, 1638-1850: A Geographic Interpretation. University Park: Dept. of Geography, Pennsylvania State University, 1977.
MLA (9th ed.) CitationFlorin, John William. The Advance of Frontier Settlement in Pennsylvania, 1638-1850: A Geographic Interpretation. Dept. of Geography, Pennsylvania State University, 1977.
Warning: These citations may not always be 100% accurate.