Gibbons, W. P. (1833). The Advocate of science. Wm. P. Gibbons.
Lua i Stíl Chicago (17ú heag.)Gibbons, William P. The Advocate of Science. Philadelphia: Wm. P. Gibbons, 1833.
Lua MLA (8ú heag.)Gibbons, William P. The Advocate of Science. Wm. P. Gibbons, 1833.
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