APA (7th ed.) Citation

Johnsen, J. E. c. (1940). Interstate - trade barriers. Wilson.

Chicago Style (17th ed.) Citation

Johnsen, Julia Emily comp. Interstate - Trade Barriers. New York: Wilson, 1940.

MLA (9th ed.) Citation

Johnsen, Julia Emily comp. Interstate - Trade Barriers. Wilson, 1940.

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