Cita APA (7a ed.)

Schweingruber, F. H., & Brunner, M. (2007). Tree-ring measurements of Picea mariana (Black spruce) from sample KATH-112. PANGAEA.

Cita Chicago Style (17a ed.)

Schweingruber, Fritz Hans, y Margrit Brunner. Tree-ring Measurements of Picea Mariana (Black Spruce) from Sample KATH-112. PANGAEA, 2007.

Cita MLA (9a ed.)

Schweingruber, Fritz Hans, y Margrit Brunner. Tree-ring Measurements of Picea Mariana (Black Spruce) from Sample KATH-112. PANGAEA, 2007.