Παραπομπή σε μορφή APA (7η εκδ.)

Bak, P. (1996). How nature works: The science of self-organized criticality. Copernicus.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Bak, P. How Nature Works: The Science of Self-organized Criticality. New York: Copernicus, 1996.

Παραπομπή σε μορφή MLA (8th εκδ.)

Bak, P. How Nature Works: The Science of Self-organized Criticality. Copernicus, 1996.