Cita APA (7a ed.)

Schweingruber, F. H., & Conkey, L. (2007). Tree-ring measurements of Picea rubens (Red spruce) from sample SUGA-71. PANGAEA.

Cita Chicago Style (17a ed.)

Schweingruber, Fritz Hans, y Laura Conkey. Tree-ring Measurements of Picea Rubens (Red Spruce) from Sample SUGA-71. PANGAEA, 2007.

Cita MLA (9a ed.)

Schweingruber, Fritz Hans, y Laura Conkey. Tree-ring Measurements of Picea Rubens (Red Spruce) from Sample SUGA-71. PANGAEA, 2007.