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APA (7th ed.) Zitazioa
Bull Charles Livingston, Carvalho Abílio Pacheco de, Estados Unidos Treasury Department, & Estados Unidos da América Committee on Public Information Division of Pictorial Publicity. (1917). Keep him free. Committee on Public Information.
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Chicago Style (17th ed.) Zitazioa
Bull Charles Livingston, Carvalho Abílio Pacheco de, Estados Unidos Treasury Department, eta Estados Unidos da América Committee on Public Information Division of Pictorial Publicity. Keep Him Free. Committee on Public Information, 1917.
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MLA (9th ed.) Zitazioa
Bull Charles Livingston, et al. Keep Him Free. Committee on Public Information, 1917.
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