Cita APA (7a ed.)

Schweingruber, F. H. (2007). Tree-ring measurements of Picea engelmannii (Engelmann spruce) from sample SYLVAN-102. PANGAEA.

Cita Chicago Style (17a ed.)

Schweingruber, Fritz Hans. Tree-ring Measurements of Picea Engelmannii (Engelmann Spruce) from Sample SYLVAN-102. PANGAEA, 2007.

Cita MLA (9a ed.)

Schweingruber, Fritz Hans. Tree-ring Measurements of Picea Engelmannii (Engelmann Spruce) from Sample SYLVAN-102. PANGAEA, 2007.