Friedman, M. L. (1988). Sculpture inside outside. Walker Art Center.
Lua i Stíl Chicago (17ú heag.)Friedman, Martin L. Sculpture Inside Outside. Minneapolis: Walker Art Center, 1988.
Lua MLA (9ú heag.)Friedman, Martin L. Sculpture Inside Outside. Walker Art Center, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.