^ Caesium is the spelling recommended by the International Union of Pure and Applied Chemistry (IUPAC).[7] The American Chemical Society (ACS) has used the spelling cesium since 1921,[8][9] following Webster's New International Dictionary.
↑ Caesium punika éjaan sané kanikayang olih Pasatuan Internasional Kimia Murni miwah Terapan (IUPAC).[2] Seka Kimia Amérika (ACS) sampun nganggén éjaan césium saking warsa 1921,[3][4] mawit Webster's New International Dictionary.