Παραπομπή APA
Maturana, H. R., & Varela, F. J. (1998). The tree of knowledge: The biological roots of human understanding (Rev. ed.). Boston: Shambhala.
Παραπομπή Chicago StyleMaturana, Humberto R., and Francisco J. Varela. The Tree of Knowledge: The Biological Roots of Human Understanding. Rev. ed. Boston: Shambhala, 1998.
Παραπομπή MLAMaturana, Humberto R., and Francisco J. Varela. The Tree of Knowledge: The Biological Roots of Human Understanding. Rev. ed. Boston: Shambhala, 1998.
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