APA (7th ed.) Citation

Burk, D. (1949). Maximum efficiency of photosynthesis. Science, 110, 225. https://doi.org/10.1126/science.110.2853.225

Chicago Style (17th ed.) Citation

Burk, D. "Maximum Efficiency of Photosynthesis." Science 110 (1949): 225. https://doi.org/10.1126/science.110.2853.225.

MLA (9th ed.) Citation

Burk, D. "Maximum Efficiency of Photosynthesis." Science, vol. 110, 1949, p. 225, https://doi.org/10.1126/science.110.2853.225.