Smithsonian Institution. Office of the Secretary, Langley, S. P., & Very, F. W. (1901). On cheapest form of light. [publisher not identified].
Chicago Style (17th ed.) CitationSmithsonian Institution. Office of the Secretary, S. P. Langley, and F. W. Very. On Cheapest Form of Light. Washington, D.C.: [publisher not identified], 1901.
MLA (9th ed.) CitationSmithsonian Institution. Office of the Secretary, et al. On Cheapest Form of Light. [publisher not identified], 1901.
Warning: These citations may not always be 100% accurate.