Ferleger Brandes, S. (1991). Richard Long: Walking in circles / [exhib. and publ. organized by Susan Ferleger Brandes]. Thames & Hudson.
Lua i Stíl Chicago (17ú heag.)Ferleger Brandes, Susan. Richard Long: Walking in Circles / [exhib. and Publ. Organized by Susan Ferleger Brandes]. London: Thames & Hudson, 1991.
Lua MLA (8ú heag.)Ferleger Brandes, Susan. Richard Long: Walking in Circles / [exhib. and Publ. Organized by Susan Ferleger Brandes]. Thames & Hudson, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.