Παραπομπή APA

Zimmermann, M. H. (1977). Trees, structure and function. Springer-Verlag.

Παραπομπή Chicago Style

Zimmermann, Martin H. Trees, Structure and Function. New York: Springer-Verlag, 1977.

Παραπομπή MLA

Zimmermann, Martin H. Trees, Structure and Function. Springer-Verlag, 1977.