APA (7th ed.) Citation

Gemmill, P. F. (1947). Current economic problems (3rd ed.). Harper & Brothers.

Chicago Style (17th ed.) Citation

Gemmill, Paul F. Current Economic Problems. 3rd ed. New York [etc.]: Harper & Brothers, 1947.

MLA (9th ed.) Citation

Gemmill, Paul F. Current Economic Problems. 3rd ed. Harper & Brothers, 1947.