Gaya APA
Checkland, P., Scholes, J. (1999).
Soft System Methodology in Action / Peter Checkland, Jim Scholes .
England:
Willey.
Gaya MLA
Checkland, Peter., Scholes, Jim.
"Soft System Methodology in Action / Peter Checkland, Jim Scholes".
England:
Willey,
1999.
Text.