APA (7th ed.) Citation

Hultgren, T. (1944). Railway traffic expansion and use of resources in World War II. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Hultgren, Thor. Railway Traffic Expansion and Use of Resources in World War II. New York: National Bureau of Economic Research, 1944.

MLA (9th ed.) Citation

Hultgren, Thor. Railway Traffic Expansion and Use of Resources in World War II. National Bureau of Economic Research, 1944.