Clemens, S. (1839). Sub-Series 32: Clemens, Sherrard, 1839-1843. Saint Louis University Libraries Digitization Center.
Dyfyniad Arddull ChicagoClemens, Sherrard. Sub-Series 32: Clemens, Sherrard, 1839-1843. Saint Louis University Libraries Digitization Center, 1839.
Dyfyniad MLAClemens, Sherrard. Sub-Series 32: Clemens, Sherrard, 1839-1843. Saint Louis University Libraries Digitization Center, 1839.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.