APA
Planning and Transport Research and Computation International Association, . (19). Perspectives / PTRC. London: PTRC Education and Research Services.
Chicago
Planning and Transport Research and Computation International Association, . 19. Perspectives / PTRC. London: PTRC Education and Research Services.
Harvard
Planning and Transport Research and Computation International Association, . (19). Perspectives / PTRC. London: PTRC Education and Research Services.
MLA
Planning and Transport Research and Computation International Association, . Perspectives / PTRC. London: PTRC Education and Research Services. 19.