APA (7th ed.) Citation

Sefcik, L., Zak, D., & Ellsworth, D. (2006). Photosynthetic responses to understory shade and elevated carbon dioxide concentration in four northern hardwood tree species. OXFORD UNIV PRESS.

Chicago Style (17th ed.) Citation

Sefcik, Lesley, D.R Zak, and D.S Ellsworth. Photosynthetic Responses to Understory Shade and Elevated Carbon Dioxide Concentration in Four Northern Hardwood Tree Species. OXFORD UNIV PRESS, 2006.

MLA (9th ed.) Citation

Sefcik, Lesley, et al. Photosynthetic Responses to Understory Shade and Elevated Carbon Dioxide Concentration in Four Northern Hardwood Tree Species. OXFORD UNIV PRESS, 2006.