Παραπομπή σε μορφή APA (7η εκδ.)

Sheather, G. D. (1969). North and central great lakes region: A general systems theory analysis. Athens technological organization (ATO).

Παραπομπή σε μορφή Chicago (17η εκδ.)

Sheather, G. D. North and Central Great Lakes Region: A General Systems Theory Analysis. Athens: Athens technological organization (ATO), 1969.

Παραπομπή σε μορφή MLA (9th εκδ.)

Sheather, G. D. North and Central Great Lakes Region: A General Systems Theory Analysis. Athens technological organization (ATO), 1969.