Παραπομπή σε μορφή APA (7η εκδ.)

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.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Core, Earl Lemley, και 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.

Παραπομπή σε μορφή MLA (9th εκδ.)

Core, Earl Lemley, και 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.