American Anti-Slavery Society, Massachusetts Anti-slavery Fair, National Anti-slavery Bazaar, & Chapman, M. W. (1839). The Liberty bell. American Anti-Slavery Society.
Dyfyniad Arddull ChicagoAmerican Anti-Slavery Society, Massachusetts Anti-slavery Fair, National Anti-slavery Bazaar, and Maria Weston Chapman. The Liberty Bell. Boston: American Anti-Slavery Society, 1839.
Dyfyniad MLAAmerican Anti-Slavery Society, et al. The Liberty Bell. American Anti-Slavery Society, 1839.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.