Cita APA (7a ed.)

Harnden, R., & Espejo, R. (1989). The viable system model: Interpretations and applications of Stafford Beer's VSM ([repr. 92].). John Wiley & Sons.

Cita Chicago Style (17a ed.)

Harnden, Roger, y Raul Espejo. The Viable System Model: Interpretations and Applications of Stafford Beer's VSM. [repr. 92]. Chichester [etc.]: John Wiley & Sons, 1989.

Cita MLA (9a ed.)

Harnden, Roger, y Raul Espejo. The Viable System Model: Interpretations and Applications of Stafford Beer's VSM. [repr. 92]. John Wiley & Sons, 1989.