APA (7th ed.) Citation

Parpia, F., Froese Fischer, C., & Grant, I. (2006). GRASP92: A package for large-scale relativistic atomic structure calculations. Computer physics communications, 175(11), 745-747. https://doi.org/10.1016/j.cpc.2006.07.021

Chicago Style (17th ed.) Citation

Parpia, F.A, C. Froese Fischer, and I.P Grant. "GRASP92: A Package for Large-scale Relativistic Atomic Structure Calculations." Computer Physics Communications 175, no. 11 (2006): 745-747. https://doi.org/10.1016/j.cpc.2006.07.021.

MLA (9th ed.) Citation

Parpia, F.A, et al. "GRASP92: A Package for Large-scale Relativistic Atomic Structure Calculations." Computer Physics Communications, vol. 175, no. 11, 2006, pp. 745-747, https://doi.org/10.1016/j.cpc.2006.07.021.