APA-referens

Locklin, D. P. (1972). Economics of Transportation (7th ed.). Richard D. Irwin.

Chicago-stil citat

Locklin, D. Philiph. Economics of Transportation. 7th ed. Illiniois: Richard D. Irwin, 1972.

MLA-referens

Locklin, D. Philiph. Economics of Transportation. 7th ed. Richard D. Irwin, 1972.