Cita APA (7a ed.)

Richmond, B. (2004). An introduction to systems thinking: Ithink software. Iseesystems.

Cita Chicago Style (17a ed.)

Richmond, Barry. An Introduction to Systems Thinking: Ithink Software. Lebanon: Iseesystems, 2004.

Cita MLA (9a ed.)

Richmond, Barry. An Introduction to Systems Thinking: Ithink Software. Iseesystems, 2004.