Cohen, R. D., King, B. D., Guenther, C., & Janzen, E. D. (1991). Effect of pre-partum parenteral supplementation of pregnant beef cows with selenium/vitamin E on cow and calf plasma selenium and productivity.
استشهاد بنمط شيكاغوCohen, Roger D.H., Brenda D. King, Cheryl Guenther, و Eugene D. Janzen. Effect of Pre-partum Parenteral Supplementation of Pregnant Beef Cows With Selenium/vitamin E On Cow and Calf Plasma Selenium and Productivity. 1991.
MLA استشهادCohen, Roger D.H., Brenda D. King, Cheryl Guenther, و Eugene D. Janzen. Effect of Pre-partum Parenteral Supplementation of Pregnant Beef Cows With Selenium/vitamin E On Cow and Calf Plasma Selenium and Productivity. 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.