APA (7th ed.) Citation

Sigel, H., & Sigel, A. (1989). Interrelations among metal ions, enzymes, and gene expression. M. Dekker.

Chicago Style (17th ed.) Citation

Sigel, Helmut, and Astrid Sigel. Interrelations Among Metal Ions, Enzymes, and Gene Expression. New York: M. Dekker, 1989.

MLA (9th ed.) Citation

Sigel, Helmut, and Astrid Sigel. Interrelations Among Metal Ions, Enzymes, and Gene Expression. M. Dekker, 1989.