SpringerLink (Online service), Hull, R. N., Barbu, C., & Goncharova, N. (2007). Strategies to Enhance Environmental Security in Transition Countries. Springer Netherlands.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Ruth N. Hull, Constantin-Horia Barbu, και Nadezhda Goncharova. Strategies to Enhance Environmental Security in Transition Countries. Dordrecht: Springer Netherlands, 2007.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Strategies to Enhance Environmental Security in Transition Countries. Springer Netherlands, 2007.
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