Cita APA (7a ed.)

Churchman, C. W. (1968). The systems approach . A Delta Book.

Cita Chicago Style (17a ed.)

Churchman, Charles West. The Systems Approach . [New York]: A Delta Book, 1968.

Cita MLA (9a ed.)

Churchman, Charles West. The Systems Approach . A Delta Book, 1968.