@unpublished{city2016spatial, title = {Spatial Development Framework 2040} author = {City of Johannesburg, Development Planning}, url = {https://joburg.org.za/documents_/Pages/Key%20Documents/policies/Development%20Planning%20%EF%BC%86%20Urban%20Management/Citywide%20Spatial%20Policies/Citywide-Spatial-Policies.aspx}, year = {2016} }