APA
Langen M. d., Leeuwen I. v., Verster A. C. P. & Nederlands Economisch Instituut (Rotterdam). (1974). The influence of accessibility on the spatial distribution of activities in an urban system: a progress report. Rotterdam: Netherlands Economic Institute.
Chicago
Langen Miek de, Leeuwen Irma van, Verster A C P and Nederlands Economisch Instituut (Rotterdam). 1974. The influence of accessibility on the spatial distribution of activities in an urban system: a progress report. Rotterdam: Netherlands Economic Institute.
Harvard
Langen M. d., Leeuwen I. v., Verster A. C. P. and Nederlands Economisch Instituut (Rotterdam). (1974). The influence of accessibility on the spatial distribution of activities in an urban system: a progress report. Rotterdam: Netherlands Economic Institute.
MLA
Langen Miek de, Leeuwen Irma van, Verster A C P and Nederlands Economisch Instituut (Rotterdam). The influence of accessibility on the spatial distribution of activities in an urban system: a progress report. Rotterdam: Netherlands Economic Institute. 1974.