Cita APA (7a ed.)

Checkland, P., & Scholes, J. (1990). Soft systems methodology in action. Wiley.

Cita Chicago Style (17a ed.)

Checkland, Peter, y Jim Scholes. Soft Systems Methodology in Action. New York: Wiley, 1990.

Cita MLA (9a ed.)

Checkland, Peter, y Jim Scholes. Soft Systems Methodology in Action. Wiley, 1990.