Hjertstrand, Å. XIth International Astronautical Congress Stockholm 1960 =: XI. Internationaler Astronautischer Kongress = = XIe Congrès International D Astronautique : Proceedings Vol. II Small Sounding Rockets Symposium. Springer International Publishing.
Style de citation Chicago (17e éd.)Hjertstrand, Åke. XIth International Astronautical Congress Stockholm 1960 =: XI. Internationaler Astronautischer Kongress = = XIe Congrès International D Astronautique : Proceedings Vol. II Small Sounding Rockets Symposium. Cham: Springer International Publishing.
Style de citation MLA (8e éd.)Hjertstrand, Åke. XIth International Astronautical Congress Stockholm 1960 =: XI. Internationaler Astronautischer Kongress = = XIe Congrès International D Astronautique : Proceedings Vol. II Small Sounding Rockets Symposium. Springer International Publishing.