Cite
Comparison of the sum-over-states and finite perturbation theories of electrical polarizability and nuclear spin-spin coupling
MLA
Ditchfield, R., et al. “Comparison of the Sum-over-States and Finite Perturbation Theories of Electrical Polarizability and Nuclear Spin-Spin Coupling.” Molecular Physics, vol. 18, no. 4, Apr. 1970, pp. 433–40. EBSCOhost, https://doi.org/10.1080/00268977000100501.
APA
Ditchfield, R., Ostlund, N. S., Murrell, J. N., & Turpin, M. A. (1970). Comparison of the sum-over-states and finite perturbation theories of electrical polarizability and nuclear spin-spin coupling. Molecular Physics, 18(4), 433–440. https://doi.org/10.1080/00268977000100501
Chicago
Ditchfield, R., N. S. Ostlund, J. N. Murrell, and M. A. Turpin. 1970. “Comparison of the Sum-over-States and Finite Perturbation Theories of Electrical Polarizability and Nuclear Spin-Spin Coupling.” Molecular Physics 18 (4): 433–40. doi:10.1080/00268977000100501.