Cita APA (7a ed.)

Kramer, N. J. T. A., & Smit, J. d. (1977). Systems thinking: Concepts and notions. H. E. Stenfert Kroese B. V..

Cita Chicago Style (17a ed.)

Kramer, N. J. T. A.., y Jacob de Smit. Systems Thinking: Concepts and Notions. Leiden: H. E. Stenfert Kroese B. V., 1977.

Cita MLA (9a ed.)

Kramer, N. J. T. A.., y Jacob de Smit. Systems Thinking: Concepts and Notions. H. E. Stenfert Kroese B. V., 1977.