Olmsted, D. (2012). Letters on Astronomy in which the Elements of the Science are Familiarly Explained in Connection with Biographical Sketches of the Most Eminent Astronomers. Project Gutenberg.
Chicago Style (17th ed.) CitationOlmsted, Denison. Letters on Astronomy in Which the Elements of the Science Are Familiarly Explained in Connection with Biographical Sketches of the Most Eminent Astronomers. Project Gutenberg, 2012.
MLA (9th ed.) CitationOlmsted, Denison. Letters on Astronomy in Which the Elements of the Science Are Familiarly Explained in Connection with Biographical Sketches of the Most Eminent Astronomers. Project Gutenberg, 2012.
Warning: These citations may not always be 100% accurate.