Cita APA (7a ed.)
Richmond, B. The Thinking in Systems Thinking. Pegasus Communications.
Cita estilo Chicago (17a ed.)
Richmond, Barry. The Thinking in Systems Thinking. Boston, EUA: Pegasus Communications.
Cita MLA (9a ed.)
Richmond, Barry. The Thinking in Systems Thinking. Pegasus Communications.
Precaución: Estas citas no son 100% exactas.