Armstrong, R. (1991). 1991 Biennial exhibition: Richard Armstrong [et al.]. Whitney Museum of American Art; W.W. Norton.
Lua i Stíl Chicago (17ú heag.)Armstrong, Richard. 1991 Biennial Exhibition: Richard Armstrong [et Al.]. New York; New York ; London: Whitney Museum of American Art; W.W. Norton, 1991.
Lua MLA (8ú heag.)Armstrong, Richard. 1991 Biennial Exhibition: Richard Armstrong [et Al.]. Whitney Museum of American Art; W.W. Norton, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.