Παραπομπή σε μορφή APA (7η εκδ.)

Harper, D. V. (1959). Economic regulation of the motor trucking industry by the States. University of Illinois Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Harper, Donald Victor. Economic Regulation of the Motor Trucking Industry by the States. Urbana, Ill: University of Illinois Press, 1959.

Παραπομπή σε μορφή MLA (9th εκδ.)

Harper, Donald Victor. Economic Regulation of the Motor Trucking Industry by the States. University of Illinois Press, 1959.