Edison, T. A., Nier, K. A., Hochfelder, D., Carlat, L., & Israel, P. (2013). The Papers of Thomas A. Edison: Research to Development at Menlo Park, January 1879-March 1881. Project Muse.
Lua i Stíl Chicago (17ú heag.)Edison, Thomas A., Keith A. Nier, David Hochfelder, Louis Carlat, agus Paul Israel. The Papers of Thomas A. Edison: Research to Development at Menlo Park, January 1879-March 1881. Baltimore, Maryland: Project Muse, 2013.
Lua MLA (9ú heag.)Edison, Thomas A., et al. The Papers of Thomas A. Edison: Research to Development at Menlo Park, January 1879-March 1881. Project Muse, 2013.
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