APA (7th ed.) Citation

Hultgren, T. (1943). Railroad travel and the state of business. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Hultgren, Thor. Railroad Travel and the State of Business. New York: National Bureau of Economic Research, 1943.

MLA (9th ed.) Citation

Hultgren, Thor. Railroad Travel and the State of Business. National Bureau of Economic Research, 1943.

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