APA

Study Week on: A Modern Approach to the Protection of the Environment, Study Week on: A Modern Approach to the Protection of the Environment, Study Week on: A Modern Approach to the Protection of the Environment & Marini-Bettòlo G. B. (1989). Study Week on A Modern Approach to the Protection of the Environment: November 2-7, 1987. Città del Vaticano: Pontificia Academia Scientiarum.

Chicago

Study Week on: A Modern Approach to the Protection of the Environment, Study Week on: A Modern Approach to the Protection of the Environment, Study Week on: A Modern Approach to the Protection of the Environment and Marini-Bettòlo G B. 1989. Study Week on A Modern Approach to the Protection of the Environment: November 2-7, 1987. Città del Vaticano: Pontificia Academia Scientiarum.

Harvard

Study Week on: A Modern Approach to the Protection of the Environment, Study Week on: A Modern Approach to the Protection of the Environment, Study Week on: A Modern Approach to the Protection of the Environment and Marini-Bettòlo G. B. (1989). Study Week on A Modern Approach to the Protection of the Environment: November 2-7, 1987. Città del Vaticano: Pontificia Academia Scientiarum.

MLA

Study Week on: A Modern Approach to the Protection of the Environment, Study Week on: A Modern Approach to the Protection of the Environment, Study Week on: A Modern Approach to the Protection of the Environment and Marini-Bettòlo G B. Study Week on A Modern Approach to the Protection of the Environment: November 2-7, 1987. Città del Vaticano: Pontificia Academia Scientiarum. 1989.