"La source" (, "The Spring") was the French entry in the Eurovision Song Contest 1968, performed in French by Isabelle Aubret. This was Aubret's second appearance on the Eurovision stage, in 1962 she had won the contest with "Un premier amour". In turn, one of the lyricists of "La source", Guy Bonnet, would return to the Contest as an artist in 1970 and 1983, singing "Marie-Blanche" and "Vivre" respectively.