Ewing, R and R Cervero. Travel and the Built Environment: A Synthesis(PDF). Transportation Research Record, 1780: 87-114. 2001. Transportation Research Record 1780,87-114. 2001 [2008-07-22]. (原始内容存档(PDF)于2016-10-20).
Ewing, R and R Cervero. Travel and the Built Environment: A Synthesis(PDF). Transportation Research Record, 1780: 87-114. 2001. Transportation Research Record 1780,87-114. 2001 [2008-07-22]. (原始内容存档(PDF)于2016-10-20).