From 1985 to 1989 , he was the leader of the Workers ' Youth League .
From 1979 to 1981 , Stoltenberg was a journalist for Arbeiderbladet .
From 1985 to 1989 , Stoltenberg was the journalist of the Workers ' Youth League .
From 1979 to 1981 , Stoltenberg was a journalist for Arbeiderbladet .