ABLER, R. (1972). Spatial organization: The geographer's view of of the world. Prentice-Hall.
Citazione stile Chigago Style (17a edizione)ABLER, Ronald. Spatial Organization: The Geographer's View of of the World. London: Prentice-Hall, 1972.
Citatione MLA (9a ed.)ABLER, Ronald. Spatial Organization: The Geographer's View of of the World. Prentice-Hall, 1972.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.