Gray, A. (2012). The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee. Project Gutenberg.
Chicago Style (17th ed.) CitationGray, Asa. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee. Project Gutenberg, 2012.
MLA (9th ed.) CitationGray, Asa. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee. Project Gutenberg, 2012.
Warning: These citations may not always be 100% accurate.