Smithsonian Institution. Office of the Secretary, Abbot, C. G., & Moore, A. F. (1920). Observations of total solar eclipse of May 29, 1919. [publisher not identified].
Chicago Style (17th ed.) CitationSmithsonian Institution. Office of the Secretary, C. G. Abbot, and A. F. Moore. Observations of Total Solar Eclipse of May 29, 1919. Washington, D.C.: [publisher not identified], 1920.
MLA (9th ed.) CitationSmithsonian Institution. Office of the Secretary, et al. Observations of Total Solar Eclipse of May 29, 1919. [publisher not identified], 1920.
Warning: These citations may not always be 100% accurate.