Lua APA (7ú heag.)

(2001). Gisla Burkhardt: Underfoot in New York ; Manhole-Cover-Frottagen.

Lua i Stíl Chicago (17ú heag.)

Gisla Burkhardt: Underfoot in New York ; Manhole-Cover-Frottagen. Berlin, 2001.

Lua MLA (8ú heag.)

Gisla Burkhardt: Underfoot in New York ; Manhole-Cover-Frottagen. 2001.

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