APA-ийн эшлэл(7 дахь хэвлэлт)

Checkland, P. (1999). Soft systems methodology: A 30 year retrospective. John Wiley and Sons.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Checkland, Peter. Soft Systems Methodology: A 30 Year Retrospective. Chichester: John Wiley and Sons, 1999.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Checkland, Peter. Soft Systems Methodology: A 30 Year Retrospective. John Wiley and Sons, 1999.