Cita APA (7a ed.)

Schweingruber, F. H., & Keller, R. (2007). Tree-ring measurements of Picea obovata (Sibirean spruce) from sample NADIMPCO-51. PANGAEA.

Cita Chicago Style (17a ed.)

Schweingruber, Fritz Hans, y Regula Keller. Tree-ring Measurements of Picea Obovata (Sibirean Spruce) from Sample NADIMPCO-51. PANGAEA, 2007.

Cita MLA (9a ed.)

Schweingruber, Fritz Hans, y Regula Keller. Tree-ring Measurements of Picea Obovata (Sibirean Spruce) from Sample NADIMPCO-51. PANGAEA, 2007.