APA (7th ed.) Citation

NB, F. (1981). Regulatory proteins. Science (New York, N.Y.), 213(4506), 431. https://doi.org/10.1126/science.213.4506.431-a

Chicago Style (17th ed.) Citation

NB, Finter. "Regulatory Proteins." Science (New York, N.Y.) 213, no. 4506 (1981): 431. https://doi.org/10.1126/science.213.4506.431-a.

MLA (9th ed.) Citation

NB, Finter. "Regulatory Proteins." Science (New York, N.Y.), vol. 213, no. 4506, 1981, p. 431, https://doi.org/10.1126/science.213.4506.431-a.