Cita APA (7a ed.)
Sigel, A., Sigel, H., & Sigel, R. K. O. (2017). Lead: Its effects on environment and health. De Gruyter.
Cita Chicago Style (17a ed.)
Sigel, Astrid, Helmut Sigel, y Roland K. O. Sigel. Lead: Its Effects on Environment and Health. Berlin, [Germany] ; Boston, [Massachusetts]: De Gruyter, 2017.
Cita MLA (9a ed.)
Sigel, Astrid, et al. Lead: Its Effects on Environment and Health. De Gruyter, 2017.
Precaución: Estas citas no son 100% exactas.