Cita APA (7a ed.)
Tyler, V. E. Focus on Forgeries: A Guide to Forgeries of Common Stamps.
Cita Chicago Style (17a ed.)
Tyler, Varro E. Focus on Forgeries: A Guide to Forgeries of Common Stamps.
Cita MLA (9a ed.)
Tyler, Varro E. Focus on Forgeries: A Guide to Forgeries of Common Stamps.
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