Gaya APA

Checkland, P., John, I, P. (2006). Learning for action: a short definitive account of soft systems methodology and its use for practitioners teacher and students . New Jersey: .

Gaya MLA

Checkland, Peter., John, I., Poulter,. "Learning for action: a short definitive account of soft systems methodology and its use for practitioners teacher and students". New Jersey: , 2006. Text.