Ert & Blum, S. (1976). Designs by ert: Fashion drawings and illustrations from harper's bazar. Dover Publications.
Chicago-viite (17. p.)Ert ja Stella Blum. Designs by Ert: Fashion Drawings and Illustrations from Harper's Bazar. New York: Dover Publications, 1976.
MLA-viite (9. p.)Ert ja Stella Blum. Designs by Ert: Fashion Drawings and Illustrations from Harper's Bazar. Dover Publications, 1976.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.