APA (7. basım) Alıntı

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

Chicago Style (17. basım) Atıf

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

MLA (9th ed.) Atıf

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