APA (7e ed.) Bronvermelding

International Symposium on Bioastronomy :Val Cenis, Savoie, France, Heidmann, J., & Klein, M. J. 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 (17e ed.) Bronvermelding

International Symposium on Bioastronomy :Val Cenis, Savoie, France, Jean Heidmann, en Michael J. Klein. 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 [etc.]: Springer.

MLA (8e ed.) Bronvermelding

International Symposium on Bioastronomy :Val Cenis, Savoie, France, et al. 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.