Παραπομπή σε μορφή APA (7η εκδ.)

Espejo, R., & Harnden, R. (1989). The viable system model: Interpretations and applications of Stafford Beer's VSM. John Wiley and Sons.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Espejo, Raul, και Roger Harnden. The Viable System Model: Interpretations and Applications of Stafford Beer's VSM. Chichester: John Wiley and Sons, 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

Espejo, Raul, και Roger Harnden. The Viable System Model: Interpretations and Applications of Stafford Beer's VSM. John Wiley and Sons, 1989.