Lua APA (7ú heag.)

Friis-Hansen, D., & Brettell, R. R. (1996). Richard Long: Circles, Cycles, Mud, Stones.

Lua i Stíl Chicago (17ú heag.)

Friis-Hansen, Dana, agus Richard R. Brettell. Richard Long: Circles, Cycles, Mud, Stones. Houston, 1996.

Lua MLA (8ú heag.)

Friis-Hansen, Dana, agus Richard R. Brettell. Richard Long: Circles, Cycles, Mud, Stones. 1996.

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