Speck, W., & Cane, H. (1991). The safer sex photobook: Photographs and video prints / Wieland Speck & Harry Cane. Vis-à-Vis.
Cita Chicago (17th ed.)Speck, Wieland, i Harry Cane. The Safer Sex Photobook: Photographs and Video Prints / Wieland Speck & Harry Cane. Berlin: Vis-à-Vis, 1991.
Cita MLA (8th ed.)Speck, Wieland, i Harry Cane. The Safer Sex Photobook: Photographs and Video Prints / Wieland Speck & Harry Cane. Vis-à-Vis, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.