(1913). Problems in eugenics. The Eugenics Education Society.
Chicago-Zitierstil (17. Ausg.)Problems in Eugenics. Adelphi: The Eugenics Education Society, 1913.
MLA-Zitierstil (8. Ausg.)Problems in Eugenics. The Eugenics Education Society, 1913.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.