Citação norma APA

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

Citação norma Chicago

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

Citação norma MLA

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

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.