Johnson, R. W., & Tyree, M. T. (1992). Effect of Stem Water Content on Sap Flow from Dormant Maple and Butternut Stems: Induction of Sap Flow in Butternut.
استشهاد بنمط شيكاغوJohnson, Robert W., و Melvin T. Tyree. Effect of Stem Water Content On Sap Flow From Dormant Maple and Butternut Stems: Induction of Sap Flow in Butternut. 1992.
MLA استشهادJohnson, Robert W., و Melvin T. Tyree. Effect of Stem Water Content On Sap Flow From Dormant Maple and Butternut Stems: Induction of Sap Flow in Butternut. 1992.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.