Cita APA (7a ed.)
Checkland, P. (1981). Systems thinking, systems practice. Wiley.
Cita Chicago Style (17a ed.)
Checkland, Peter. Systems Thinking, Systems Practice. Chichester: Wiley, 1981.
Cita MLA (9a ed.)
Checkland, Peter. Systems Thinking, Systems Practice. Wiley, 1981.
Precaución: Estas citas no son 100% exactas.