Cita APA (7a ed.)

Schweingruber, F. H., & Frei, S. (2007). Tree-ring measurements of Picea obovata (Sibirean spruce) from sample YEVOYPCO-42. PANGAEA.

Cita Chicago Style (17a ed.)

Schweingruber, Fritz Hans, y Sybille Frei. Tree-ring Measurements of Picea Obovata (Sibirean Spruce) from Sample YEVOYPCO-42. PANGAEA, 2007.

Cita MLA (9a ed.)

Schweingruber, Fritz Hans, y Sybille Frei. Tree-ring Measurements of Picea Obovata (Sibirean Spruce) from Sample YEVOYPCO-42. PANGAEA, 2007.