Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Checkland, Peter, y Jim Scholes. Soft Systems Methodology in Action. Chichester: John Wiley & Sons Limited, 1990.

Cita MLA (9a ed.)

Checkland, Peter, y Jim Scholes. Soft Systems Methodology in Action. John Wiley & Sons Limited, 1990.