APA (7th ed.) Citation

Gemmill, P. F., & Blodgett, R. H. (1947). Current economic problems. Harper.

Chicago Style (17th ed.) Citation

Gemmill, Paul Fleming, and Ralph Hamilton Blodgett. Current Economic Problems. New York: Harper, 1947.

MLA (9th ed.) Citation

Gemmill, Paul Fleming, and Ralph Hamilton Blodgett. Current Economic Problems. Harper, 1947.