Schweingruber, F. H., & Häfliger, M. (2007). Tree-ring measurements of Picea glauca (White spruce) from sample PROVIPGL-162. PANGAEA.
Citazione stile Chigago Style (17a edizione)Schweingruber, Fritz Hans, e Martin Häfliger. Tree-ring Measurements of Picea Glauca (White Spruce) from Sample PROVIPGL-162. PANGAEA, 2007.
Citatione MLA (9a ed.)Schweingruber, Fritz Hans, e Martin Häfliger. Tree-ring Measurements of Picea Glauca (White Spruce) from Sample PROVIPGL-162. PANGAEA, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.