Gaya APA

Checkland, Peter. (2009). Systems thinking, systems practice : includes a 30-year retrospective . West Sussex, England: John Wiley & Sons.

Gaya Chicago

Checkland, Peter. Systems thinking, systems practice : includes a 30-year retrospective. West Sussex, England: John Wiley & Sons, 2009. Text.

Gaya MLA

Checkland, Peter. Systems thinking, systems practice : includes a 30-year retrospective. West Sussex, England: John Wiley & Sons, 2009. Text.

Gaya Turabian

Checkland, Peter. Systems thinking, systems practice : includes a 30-year retrospective. West Sussex, England: John Wiley & Sons, 2009. Print.