Heidmann, J., & Klein, M. J. (1991). Bioastronomy: The Search for Extraterrestial Life - The Exploration Broadens : Proceedings of the Third International Symposium on Bioastronomy Held at Val Cenis, Savoie, France, 18–23 June 1990. Springer. https://doi.org/10.1007/3-540-54752-5
Chicago-Zitierstil (17. Ausg.)Heidmann, Jean, und Michael J. Klein. Bioastronomy: The Search for Extraterrestial 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. https://doi.org/10.1007/3-540-54752-5.
MLA-Zitierstil (9. Ausg.)Heidmann, Jean, und Michael J. Klein. Bioastronomy: The Search for Extraterrestial Life - The Exploration Broadens : Proceedings of the Third International Symposium on Bioastronomy Held at Val Cenis, Savoie, France, 18–23 June 1990. Springer, 1991. https://doi.org/10.1007/3-540-54752-5.