APA Citation

Hertel, R. F., Maass, T., & Muller, V. R. (1991). Nickel. Geneva: World Health Organization.

Chicago Style Citation

Hertel, R. F., T. Maass, and V. R. Muller. Nickel. Geneva: World Health Organization, 1991.

MLA Citation

Hertel, R. F., T. Maass, and V. R. Muller. Nickel. Geneva: World Health Organization, 1991.

Warning: These citations may not always be 100% accurate.