APA (7th ed.) Citation

Periodic table of elements. National Library of Medicine, National Center for Biotechnology Information.

Chicago Style (17th ed.) Citation

Periodic Table of Elements. [Bethesda, Maryland]: National Library of Medicine, National Center for Biotechnology Information.

MLA (9th ed.) Citation

Periodic Table of Elements. National Library of Medicine, National Center for Biotechnology Information.

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