Citazione APA

Fair, M. L., & Williams, E. W. (1959). Economics of transportation. Harper.

Stile di citazione Chicago

Fair, Marvine L., e Earnest W. Williams. Economics of Transportation. New York: Harper, 1959.

Citazione MLA

Fair, Marvine L., e Earnest W. Williams. Economics of Transportation. Harper, 1959.