APA (7th ed.) Citation

Umikalsom, Y., Grayer-Barkmeijer, R. J., & Harborne, J. B. (1994). A comparison of the flavonoids in Athyriaceae and Aspleniaceae.

Chicago Style (17th ed.) Citation

Umikalsom, Y., Renée J. Grayer-Barkmeijer, and Jeffrey B. Harborne. A Comparison of the Flavonoids in Athyriaceae and Aspleniaceae. 1994.

MLA (9th ed.) Citation

Umikalsom, Y., et al. A Comparison of the Flavonoids in Athyriaceae and Aspleniaceae. 1994.