APA (7th ed.) Citation

JP, C., CM, E., TR, H., & BS, T. (1977). Synthesis and characterization of "face-to-face" porphyrins. Proceedings of the National Academy of Sciences of the United States of America, 74(1), 18. https://doi.org/10.1073/pnas.74.1.18

Chicago Style (17th ed.) Citation

JP, Collman, Elliott CM, Halbert TR, and Tovrog BS. "Synthesis and Characterization of "Face-to-face" Porphyrins." Proceedings of the National Academy of Sciences of the United States of America 74, no. 1 (1977): 18. https://doi.org/10.1073/pnas.74.1.18.

MLA (9th ed.) Citation

JP, Collman, et al. "Synthesis and Characterization of "Face-to-face" Porphyrins." Proceedings of the National Academy of Sciences of the United States of America, vol. 74, no. 1, 1977, p. 18, https://doi.org/10.1073/pnas.74.1.18.