United States. National Conservation Congress. (2011). Proceedings of the Second National Conservation Congress at Saint Paul, September 5-8, 1910. Project Gutenberg.
Chicago Style (17th ed.) CitationUnited States. National Conservation Congress. Proceedings of the Second National Conservation Congress at Saint Paul, September 5-8, 1910. Project Gutenberg, 2011.
MLA (9th ed.) CitationUnited States. National Conservation Congress. Proceedings of the Second National Conservation Congress at Saint Paul, September 5-8, 1910. Project Gutenberg, 2011.
Warning: These citations may not always be 100% accurate.