Spear, C. (1846). The Prisoners' friend: A monthly magazine devoted to criminal reform, philosophy, literature, science and art. Charles Spear.
Lua i Stíl Chicago (17ú heag.)Spear, Charles. The Prisoners' Friend: A Monthly Magazine Devoted to Criminal Reform, Philosophy, Literature, Science and Art. Boston, Mass.: Charles Spear, 1846.
Lua MLA (8ú heag.)Spear, Charles. The Prisoners' Friend: A Monthly Magazine Devoted to Criminal Reform, Philosophy, Literature, Science and Art. Charles Spear, 1846.
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