Citazione Stile APA (7a Edizione)

:Checkland Peter. (1999). Systems thinking, systems practice: Includes a 30-year retrospective. John Wiley.

Citazione stile Chigago Style (17a edizione)

:Checkland Peter. Systems Thinking, Systems Practice: Includes a 30-year Retrospective. Chichester: John Wiley, 1999.

Citatione MLA (9a ed.)

:Checkland Peter. Systems Thinking, Systems Practice: Includes a 30-year Retrospective. John Wiley, 1999.