Campelo, C. E. C. (2017). Volunteered geographic information and the future of geospatial data. IGI GLobal, Disseminator of Knowledge.
Chicago-Zitierstil (17. Ausg.)Campelo, Claudio Elizio Calazans. Volunteered Geographic Information and the Future of Geospatial Data. Hershey PA: IGI GLobal, Disseminator of Knowledge, 2017.
MLA-Zitierstil (9. Ausg.)Campelo, Claudio Elizio Calazans. Volunteered Geographic Information and the Future of Geospatial Data. IGI GLobal, Disseminator of Knowledge, 2017.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.