Não informado. (1969). Man-environment Systems. Association for the Study of Man-Environment Relations.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Man-environment Systems. Orange, NJ: Association for the Study of Man-Environment Relations, 1969.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Man-environment Systems. Association for the Study of Man-Environment Relations, 1969.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.