APA Edition Citation

Sigel, A., Sigel, H., & Sigel, R. K. O. (1973). Metal ions in biological systems. Taylor & Francis.

Chicago Edition Citation

Sigel, Astrid, Helmut Sigel, and Roland K. O. Sigel. Metal Ions in Biological Systems. New York: Taylor & Francis, 1973.

MLA Edition Citation

Sigel, Astrid, et al. Metal Ions in Biological Systems. Taylor & Francis, 1973.