Core, E. L., & Ammons, N. P. (1999). Woody plants in winter: A manual of common trees and shrubs in winter in the northeastern United States and southeastern Canada. West Virginia University Press.
芝加哥风格引文Core, Earl Lemley, 与 Nelle P. Ammons. Woody Plants in Winter: A Manual of Common Trees and Shrubs in Winter in the Northeastern United States and Southeastern Canada. Morgantown: West Virginia University Press, 1999.
MLA引文Core, Earl Lemley, 与 Nelle P. Ammons. Woody Plants in Winter: A Manual of Common Trees and Shrubs in Winter in the Northeastern United States and Southeastern Canada. West Virginia University Press, 1999.
警告：这些引文格式不一定是100％准确.