(2019). Natural Resources and Sustainable Development. Editura Universităţii din Oradea.
Παραπομπή σε μορφή Chicago (17η εκδ.)Natural Resources and Sustainable Development. Editura Universităţii din Oradea, 2019.
Παραπομπή σε μορφή MLA (8th εκδ.)Natural Resources and Sustainable Development. Editura Universităţii din Oradea, 2019.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.
