MacKenzie, R. D. The ecological approach to the study of the human community: Roderick D. MacKenzie. The City : [Suggestions for investigation of human behavior in the urban environment].(1997).

MacKenzie, Roderick D. "The Ecological Approach to the Study of the Human Community: Roderick D. MacKenzie." The City : [Suggestions for Investigation of Human Behavior in the Urban Environment].(1997) .

MacKenzie, Roderick D. "The Ecological Approach to the Study of the Human Community: Roderick D. MacKenzie." The City : [Suggestions for Investigation of Human Behavior in the Urban Environment].(1997), .