Παραπομπή σε μορφή APA (7η εκδ.)

Samuels, G. B. (1999). Enduring roots: Encounters with trees, history, and the American landscape. Rutgers University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Samuels, Gayle Brandow. Enduring Roots: Encounters with Trees, History, and the American Landscape. New Brunswick, N.J.: Rutgers University Press, 1999.

Παραπομπή σε μορφή MLA (9th εκδ.)

Samuels, Gayle Brandow. Enduring Roots: Encounters with Trees, History, and the American Landscape. Rutgers University Press, 1999.