Ert & Blum, S. (1976). Designs by ert: Fashion drawings and illustrations from harper's bazar. Dover Publications.
Dyfyniad Arddull ChicagoErt and Stella Blum. Designs by Ert: Fashion Drawings and Illustrations from Harper's Bazar. New York: Dover Publications, 1976.
Dyfyniad MLAErt and Stella Blum. Designs by Ert: Fashion Drawings and Illustrations from Harper's Bazar. Dover Publications, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.