APA (7th ed.) Citation

Nims, L. F., Marshall, C., & Burr, H. S. (1938). Measurement of pH in circulating blood. Science, 87, 197. https://doi.org/10.1126/science.87.2252.197

Chicago Style (17th ed.) Citation

Nims, L. F., C. Marshall, and H. S. Burr. "Measurement of PH in Circulating Blood." Science 87 (1938): 197. https://doi.org/10.1126/science.87.2252.197.

MLA (9th ed.) Citation

Nims, L. F., et al. "Measurement of PH in Circulating Blood." Science, vol. 87, 1938, p. 197, https://doi.org/10.1126/science.87.2252.197.