Williams, B., & Hummelbrunner, R. (2009). Systems concepts in action: A practitioner's toolkit. Stanford Business Books.
芝加哥风格引文Williams, Bob, 与 Richard Hummelbrunner. Systems Concepts in Action: A Practitioner's Toolkit. Stanford, Calif.: Stanford Business Books, 2009.
MLA引文Williams, Bob, 与 Richard Hummelbrunner. Systems Concepts in Action: A Practitioner's Toolkit. Stanford Business Books, 2009.
警告：这些引文格式不一定是100％准确.