Sitter, W. d. (1932). Kosmos: A Course of Six Lectures on the Development of Our Insight into the Structure of the Universe, Delivered for the Lowell Institute in Boston, in November 1931. Harvard University Press. https://doi.org/10.4159/harvard.9780674331471
Chicago-Zitierstil (17. Ausg.)Sitter, Willem de. Kosmos: A Course of Six Lectures on the Development of Our Insight into the Structure of the Universe, Delivered for the Lowell Institute in Boston, in November 1931. Cambridge, Mass: Harvard University Press, 1932. https://doi.org/10.4159/harvard.9780674331471.
MLA-Zitierstil (9. Ausg.)Sitter, Willem de. Kosmos: A Course of Six Lectures on the Development of Our Insight into the Structure of the Universe, Delivered for the Lowell Institute in Boston, in November 1931. Harvard University Press, 1932. https://doi.org/10.4159/harvard.9780674331471.