Cita APA (7a ed.)

Schweingruber, F. H., & Kienast, F. (2007). Tree-ring measurements of Picea abies (Norway spruce) from sample PAV-121. PANGAEA.

Cita Chicago Style (17a ed.)

Schweingruber, Fritz Hans, y Felix Kienast. Tree-ring Measurements of Picea Abies (Norway Spruce) from Sample PAV-121. PANGAEA, 2007.

Cita MLA (9a ed.)

Schweingruber, Fritz Hans, y Felix Kienast. Tree-ring Measurements of Picea Abies (Norway Spruce) from Sample PAV-121. PANGAEA, 2007.

Precaución: Estas citas no son 100% exactas.