Παραπομπή σε μορφή APA (7η εκδ.)

Tarr, J. A. (1972). Transportation innovation and changing spatial patterns: Pittsburgh, 1850-1910. Carnegie-Mellon University, Transportation Research Institute ; NTIS [distributor].

Παραπομπή σε μορφή Chicago (17η εκδ.)

Tarr, Joel A. Transportation Innovation and Changing Spatial Patterns: Pittsburgh, 1850-1910. Pittsburgh, Pa. : Springfield, Va.: Carnegie-Mellon University, Transportation Research Institute ; NTIS [distributor], 1972.

Παραπομπή σε μορφή MLA (8th εκδ.)

Tarr, Joel A. Transportation Innovation and Changing Spatial Patterns: Pittsburgh, 1850-1910. Carnegie-Mellon University, Transportation Research Institute ; NTIS [distributor], 1972.