Heaver, T. D., & Nelson, J. C. (1977). Railway pricing under commercial freedom: The Canadian experience. Centre for Transportation Studies, University of British Columbia.
Citazione stile Chigago Style (17a edizione)Heaver, Trevor D., e James C. Nelson. Railway Pricing Under Commercial Freedom: The Canadian Experience. Vancouver: Centre for Transportation Studies, University of British Columbia, 1977.
Citatione MLA (8a ed.)Heaver, Trevor D., e James C. Nelson. Railway Pricing Under Commercial Freedom: The Canadian Experience. Centre for Transportation Studies, University of British Columbia, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.