APA (7th ed.) Citation

Locklin, D. P. (1954). Economics of transportation (6th ed.). R. D. Irwin.

Chicago Style (17th ed.) Citation

Locklin, David Philip. Economics of Transportation. 6th ed. Homewood, Ill: R. D. Irwin, 1954.

MLA (9th ed.) Citation

Locklin, David Philip. Economics of Transportation. 6th ed. R. D. Irwin, 1954.