Schweingruber, F. H. (2007). Tree-ring chronology of Picea mariana (Black spruce) compiled from tree samples LCHEVPMA. PANGAEA.
Citazione stile Chigago Style (17a edizione)Schweingruber, Fritz Hans. Tree-ring Chronology of Picea Mariana (Black Spruce) Compiled from Tree Samples LCHEVPMA. PANGAEA, 2007.
Citatione MLA (9a ed.)Schweingruber, Fritz Hans. Tree-ring Chronology of Picea Mariana (Black Spruce) Compiled from Tree Samples LCHEVPMA. PANGAEA, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.