APA (7th ed.) Citation

Schena, M., Lloyd, A. M., & Davis, R. W. (1991). A steroid-inducible gene expression system for plant cells. Proceedings of the National Academy of Sciences - PNAS, 88(23), 10421. https://doi.org/10.1073/pnas.88.23.10421

Chicago Style (17th ed.) Citation

Schena, M., A M. Lloyd, and R W. Davis. "A Steroid-inducible Gene Expression System for Plant Cells." Proceedings of the National Academy of Sciences - PNAS 88, no. 23 (1991): 10421. https://doi.org/10.1073/pnas.88.23.10421.

MLA (9th ed.) Citation

Schena, M., et al. "A Steroid-inducible Gene Expression System for Plant Cells." Proceedings of the National Academy of Sciences - PNAS, vol. 88, no. 23, 1991, p. 10421, https://doi.org/10.1073/pnas.88.23.10421.