APA
Grupp T. e. a., National Bureau of Economic Research, . (2023). An Evaluation of protected area policies in the European Union. Cambridge: NBER.
Chicago
Grupp Tristan et al, National Bureau of Economic Research, . 2023. An Evaluation of protected area policies in the European Union. Cambridge: NBER.
Harvard
Grupp T. e. a., National Bureau of Economic Research, . (2023). An Evaluation of protected area policies in the European Union. Cambridge: NBER.
MLA
Grupp Tristan et al, National Bureau of Economic Research, . An Evaluation of protected area policies in the European Union. Cambridge: NBER. 2023.