APA (7th ed.) Citation

National Center for Complementary and Alternative Medicine (U.S.). (2008). Evening primrose oil (Updated Mar. 2008.). National Center for Complementary and Alternative Medicine.

Chicago Style (17th ed.) Citation

National Center for Complementary and Alternative Medicine (U.S.). Evening Primrose Oil. Updated Mar. 2008. [Bethesda, Md.]: National Center for Complementary and Alternative Medicine, 2008.

MLA (8th ed.) Citation

National Center for Complementary and Alternative Medicine (U.S.). Evening Primrose Oil. Updated Mar. 2008. National Center for Complementary and Alternative Medicine, 2008.