^Tennes, Ragnhild Seel.
"Gitta Jønsson". In Bolstad, Erik (ed.). Store norske leksikon (in Norwegian). Oslo: Norsk nettleksikon. Retrieved 7 January 2023.
^Tennes, Ragnhild Seel.
"Gitta Jønsson". In Bolstad, Erik (ed.). Store norske leksikon (in Norwegian). Oslo: Norsk nettleksikon. Retrieved 7 January 2023.