Task Force on Human Settlements. (1975). The ecosystem approach to human settlements planning. Task Force on Human Settlements.
Chicago-viite (17. p.)Task Force on Human Settlements. The Ecosystem Approach to Human Settlements Planning. Quezon City: Task Force on Human Settlements, 1975.
MLA-viite (9. p.)Task Force on Human Settlements. The Ecosystem Approach to Human Settlements Planning. Task Force on Human Settlements, 1975.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.