Speck, J. Walkable city: How downtown can save America, one step at a time (Primera edición.).
Citazione stile Chigago Style (17a edizione)Speck, Jeff. Walkable City: How Downtown Can Save America, One Step at a Time. Primera edición.
Citatione MLA (8a ed.)Speck, Jeff. Walkable City: How Downtown Can Save America, One Step at a Time. Primera edición.
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