Cita APA (7a ed.)

Francis, B. M., & Francis , B. M. (1994). Toxic substances in the environment. John Wiley.

Cita Chicago Style (17a ed.)

Francis, B. Magnus, y Bettina Magnus Francis. Toxic Substances in the Environment. New York: John Wiley, 1994.

Cita MLA (9a ed.)

Francis, B. Magnus, y Bettina Magnus Francis. Toxic Substances in the Environment. John Wiley, 1994.