Hopkins, M. (1863). Lectures on moral science: Delivered before the Lowell Institute, Boston. Sheldon.
Lua i Stíl Chicago (17ú heag.)Hopkins, Mark. Lectures on Moral Science: Delivered Before the Lowell Institute, Boston. New York: Sheldon, 1863.
Lua MLA (8ú heag.)Hopkins, Mark. Lectures on Moral Science: Delivered Before the Lowell Institute, Boston. Sheldon, 1863.
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