 William De Sitter: Een Menschenleven. by Willem de (18721934)] SITTERSUERMONDT, E. de. [SITTER, 19480101
 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, by Willem de Sitter, 1932
 On the system of astronomical constants (Bulletin of the Astronomical institutes of the Netherlands) by Willem de Sitter, 1937
 On the longitude of the sun in the years 18641900, and the rotation of the earth (Bulletin of the astronomical institutes of the Netherlands) by Willem de Sitter, 1927
 Astronome Néerlandais: Christian Huygens, Anton Pannekoek, Willem de Sitter, Pieter Dirkszoon Keyser, Bart Bok, Jacobus Kapteyn (French Edition)
 On the expanding universe, by Willem de Sitter, 1932
 Short history of the Observatory of the University at Leiden, 16331933, by Willem de Sitter, 1933
 A determination of the inclinations and nodes of the orbits of Jupiter's satellites (Annals of the Royal Observatory, Cape of Good Hope) by Willem de Sitter, 1906
 Derivation of final inclinations and nodes of the orbital planes of Jupiter's satellites (Annals of the Cape Observatory) by Willem de Sitter, 1914
 Kosmos A course of six lectures on the development of our insight into the struc by Willem de Sitter, 19320101
 Jupiter's Galilean satellites: George Darwin lecture by Willem de Sitter, 1931
 On the secular accelerations and the fluctuations of the longitudes of the moon, the sun, Mercury, and Venus by Willem de Sitter, 1927
 The astronomical aspect of the theory of relativity, (University of California publications in mathematics) by Willem de Sitter, 1933
 Willem de Sitter by Frank Schlesinger, 1935
