Speck, J. Walkable city: How downtown can save America, one step at a time (Primera edición.).
Chicago Style (17th ed.) CitationSpeck, Jeff. Walkable City: How Downtown Can Save America, One Step at a Time. Primera edición.
MLA引文Speck, Jeff. Walkable City: How Downtown Can Save America, One Step at a Time. Primera edición.
警告：這些引文格式不一定是100％准確.