Cite
Initial formation of an indigenous crop complex in eastern North America at 3800 B.P.
MLA
Smith, Bruce D., and Richard A. Yarnell. “Initial Formation of an Indigenous Crop Complex in Eastern North America at 3800 B.P.” Proceedings of the National Academy of Sciences of the United States of America, vol. 106, no. 16, Apr. 2009, pp. 6561–66. EBSCOhost, https://doi.org/10.1073/pnas.0901846106.
APA
Smith, B. D., & Yarnell, R. A. (2009). Initial formation of an indigenous crop complex in eastern North America at 3800 B.P. Proceedings of the National Academy of Sciences of the United States of America, 106(16), 6561–6566. https://doi.org/10.1073/pnas.0901846106
Chicago
Smith, Bruce D, and Richard A Yarnell. 2009. “Initial Formation of an Indigenous Crop Complex in Eastern North America at 3800 B.P.” Proceedings of the National Academy of Sciences of the United States of America 106 (16): 6561–66. doi:10.1073/pnas.0901846106.