APA استشهاد

Brown, C. L., & Zimmermann, M. H. (1971). Trees structure and function. Springer Verlag.

استشهاد بنمط شيكاغو

Brown, C L., و M H. Zimmermann. Trees Structure and Function. New York: Springer Verlag, 1971.

MLA استشهاد

Brown, C L., و M H. Zimmermann. Trees Structure and Function. Springer Verlag, 1971.