APA-ийн эшлэл(7 дахь хэвлэлт)

Williams, B., & Hummelbrunner, R. (2009). Systems concepts in action: A practitioner's toolkit. Stanford Business Books.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Williams, Bob, ба Richard Hummelbrunner. Systems Concepts in Action: A Practitioner's Toolkit. Stanford, Calif.: Stanford Business Books, 2009.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Williams, Bob, ба Richard Hummelbrunner. Systems Concepts in Action: A Practitioner's Toolkit. Stanford Business Books, 2009.