Speck, W., & Cane, H. (1991). The safer sex photobook: Photographs and video prints / Wieland Speck & Harry Cane. Vis-à-Vis.
Lua i Stíl Chicago (17ú heag.)Speck, Wieland, agus Harry Cane. The Safer Sex Photobook: Photographs and Video Prints / Wieland Speck & Harry Cane. Berlin: Vis-à-Vis, 1991.
Lua MLA (8ú heag.)Speck, Wieland, agus Harry Cane. The Safer Sex Photobook: Photographs and Video Prints / Wieland Speck & Harry Cane. Vis-à-Vis, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.