Παραπομπή σε μορφή APA (7η εκδ.)

Underwood, P. G. (1996). Soft systems analysis and the management of libraries information services and resource centers. Library Association.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Underwood, Peter G. Soft Systems Analysis and the Management of Libraries Information Services and Resource Centers. London: Library Association, 1996.

Παραπομπή σε μορφή MLA (9th εκδ.)

Underwood, Peter G. Soft Systems Analysis and the Management of Libraries Information Services and Resource Centers. Library Association, 1996.