APA (7th ed.) Citation

Checkland, P. (1999). Soft systems methodology: A 30-year retrospective. Wiley.

Chicago Style (17th ed.) Citation

Checkland, Peter. Soft Systems Methodology: A 30-year Retrospective. Chichester ; New York: Wiley, 1999.

MLA (8th ed.) Citation

Checkland, Peter. Soft Systems Methodology: A 30-year Retrospective. Wiley, 1999.

Warning: These citations may not always be 100% accurate.