Παραπομπή σε μορφή APA (7η εκδ.)

Salthe, S. N. (1985). Evolving hierarchical systems: Their structure and representation. Columbia University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Salthe, Stanley N. Evolving Hierarchical Systems: Their Structure and Representation. New York: Columbia University Press, 1985.

Παραπομπή σε μορφή MLA (9th εκδ.)

Salthe, Stanley N. Evolving Hierarchical Systems: Their Structure and Representation. Columbia University Press, 1985.