APA (7th ed.) Citation

Howells, M., Jacobsen, C., & Kirz, J. (1987). X-ray holograms at improved resolution: A study of zymogen granules. Science, 238, 514. https://doi.org/10.1126/science.3659925

Chicago Style (17th ed.) Citation

Howells, M., C. Jacobsen, and J. Kirz. "X-ray Holograms at Improved Resolution: A Study of Zymogen Granules." Science 238 (1987): 514. https://doi.org/10.1126/science.3659925.

MLA (9th ed.) Citation

Howells, M., et al. "X-ray Holograms at Improved Resolution: A Study of Zymogen Granules." Science, vol. 238, 1987, p. 514, https://doi.org/10.1126/science.3659925.