(1991). Bioastronomy: The search for extraterrestrial life - the exploration broadens ; proceedings of the third International Symposium on Bioastronomy held at Val Cenis, Savoie, France, 18 - 23 June 1990. Springer.
Chicago-Zitierstil (17. Ausg.)Bioastronomy: The Search for Extraterrestrial Life - the Exploration Broadens ; Proceedings of the Third International Symposium on Bioastronomy Held at Val Cenis, Savoie, France, 18 - 23 June 1990. Berlin u.a: Springer, 1991.
MLA-Zitierstil (9. Ausg.)Bioastronomy: The Search for Extraterrestrial Life - the Exploration Broadens ; Proceedings of the Third International Symposium on Bioastronomy Held at Val Cenis, Savoie, France, 18 - 23 June 1990. Springer, 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.