Tonkov, S. (2021). The Postglacial Vegetation History in Southwestern Bulgaria: A Paleoecological Approach. Pensoft Publishers.
Citazione stile Chigago Style (17a edizione)Tonkov, Spasimir. The Postglacial Vegetation History in Southwestern Bulgaria: A Paleoecological Approach. Sofia, Bulgaria: Pensoft Publishers, 2021.
Citatione MLA (9a ed.)Tonkov, Spasimir. The Postglacial Vegetation History in Southwestern Bulgaria: A Paleoecological Approach. Pensoft Publishers, 2021.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.