APA (7th ed.) Citation

Stieglitz, E. J. (1940). Problems of aging. Science, 92, 506. https://doi.org/10.1126/science.92.2396.506

Chicago Style (17th ed.) Citation

Stieglitz, E. J. "Problems of Aging." Science 92 (1940): 506. https://doi.org/10.1126/science.92.2396.506.

MLA (9th ed.) Citation

Stieglitz, E. J. "Problems of Aging." Science, vol. 92, 1940, p. 506, https://doi.org/10.1126/science.92.2396.506.