PubAg

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MLA

Norby, Richard J, et al. "Co₂ Enhancement of Forest Productivity Constrained by Limited Nitrogen Availability." Proceedings of the National Academy of Sciences of the United States of America, v. 107,.45 pp. 19368-19373. doi: 10.1073/pnas.1006463107

APA

Norby, R. J, Warren, J. M, Iversen, C. M, Medlyn, B. E, & McMurtrie, R. E. (2010). CO₂ enhancement of forest productivity constrained by limited nitrogen availability. Proceedings of the National Academy of Sciences of the United States of America, 107, 19368-19373. doi: 10.1073/pnas.1006463107

Chicago

Norby, Richard J., Jeffrey M Warren, Colleen M Iversen, Belinda E Medlyn, and Ross E McMurtrie. "CO₂ enhancement of forest productivity constrained by limited nitrogen availability" Proceedings of the National Academy of Sciences of the United States of America 107, no. 45 (2010): 19368-19373. doi: 10.1073/pnas.1006463107