APA (7th ed.) Citation

Grupp, G. W. (1923). Economics of motor transportation. Appleton.

Chicago Style (17th ed.) Citation

Grupp, George W. Economics of Motor Transportation. New York: Appleton, 1923.

MLA (9th ed.) Citation

Grupp, George W. Economics of Motor Transportation. Appleton, 1923.

Warning: These citations may not always be 100% accurate.