Lua APA (7ú heag.)

Willis, L., & Bulgin, S. (1997). Lucy Willis: Light in watercolor. Watson-Guptill Publications.

Lua i Stíl Chicago (17ú heag.)

Willis, Lucy, agus Sally Bulgin. Lucy Willis: Light in Watercolor. New York, NY: Watson-Guptill Publications, 1997.

Lua MLA (9ú heag.)

Willis, Lucy, agus Sally Bulgin. Lucy Willis: Light in Watercolor. Watson-Guptill Publications, 1997.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.