Galli, Maurice P, and Nina Giambelli. The Art of Jewelry Design: Principles of Design, Rings and Earrings. Atglen, PA: Schiffer Pub, 1994.

Galli, Maurice P, and Nina Giambelli. The Art of Jewelry Design: Principles of Design, Rings and Earrings. Atglen, PA: Schiffer Pub, 1994.