:Checkland Peter. (1999). Systems thinking, systems practice: Includes a 30-year retrospective. John Wiley.
Цитирование в стиле Чикаго (17-е изд.):Checkland Peter. Systems Thinking, Systems Practice: Includes a 30-year Retrospective. Chichester: John Wiley, 1999.
Цитирование MLA (9-е изд.):Checkland Peter. Systems Thinking, Systems Practice: Includes a 30-year Retrospective. John Wiley, 1999.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.