Gaya APA

Checkland, P., Poulter, J. (2006). Learning for Action: A Short Definitive Account of Soft Systems Methodology and its use for Practitioner, Teachers and Students . United Kingdom: John Wiley & Sons LTD.

Gaya MLA

Checkland, Peter., Poulter, John. "Learning for Action: A Short Definitive Account of Soft Systems Methodology and its use for Practitioner, Teachers and Students". United Kingdom: John Wiley & Sons LTD, 2006. Texts.