Schweingruber, F. H. (2007). Tree-ring chronology of Abies borisii-regis (King Boris fir) compiled from tree samples PANET. PANGAEA.
Citazione stile Chigago Style (17a edizione)Schweingruber, Fritz Hans. Tree-ring Chronology of Abies Borisii-regis (King Boris Fir) Compiled from Tree Samples PANET. PANGAEA, 2007.
Citatione MLA (9a ed.)Schweingruber, Fritz Hans. Tree-ring Chronology of Abies Borisii-regis (King Boris Fir) Compiled from Tree Samples PANET. PANGAEA, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.