Gaya APA

al., R, F, H, F, E. (1987). Contrast Media from the Past to the Future: Symposium Berlin, March 27-28, 1987 (-). Stuttgart/New York: Georg Thieme Verlag.

Gaya MLA

al., R., Felix,, H.W., Fischer,, Et. "Contrast Media from the Past to the Future: Symposium Berlin, March 27-28, 1987". - Stuttgart/New York: Georg Thieme Verlag, 1987. Teks.