Zimmermann, B., Burak, C., Brüll, V., Stehle, P., Egert, S., Langguth, P., . . . Wolffram, S. (2017). Higher plasma quercetin levels following oral administration of an onion skin extract compared with pure quercetin dihydrate in humans. European Journal of Nutrition, 56(1), 343. https://doi.org/10.1007/s00394-015-1084-x
Chicago Style (17th ed.) CitationZimmermann, Benno, Constanze Burak, Verena Brüll, Peter Stehle, Sarah Egert, Peter Langguth, Birgit Stoffel-Wagner, Udo Sausen, and Siegfried Wolffram. "Higher Plasma Quercetin Levels Following Oral Administration of an Onion Skin Extract Compared with Pure Quercetin Dihydrate in Humans." European Journal of Nutrition 56, no. 1 (2017): 343. https://doi.org/10.1007/s00394-015-1084-x.
MLA (9th ed.) CitationZimmermann, Benno, et al. "Higher Plasma Quercetin Levels Following Oral Administration of an Onion Skin Extract Compared with Pure Quercetin Dihydrate in Humans." European Journal of Nutrition, vol. 56, no. 1, 2017, p. 343, https://doi.org/10.1007/s00394-015-1084-x.