Padron:Greenwood&Earnshaw2nd
Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd pat.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
Dokumentasyon sa padron [gumawa]
Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd pat.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.