Citazione APA

Kettner, F. (1936). The need for a secretary of peace. Biosophical Institute.

Stile di citazione Chicago

Kettner, Frederick. The Need for a Secretary of Peace. New York, N.Y.: Biosophical Institute, 1936.

Citazione MLA

Kettner, Frederick. The Need for a Secretary of Peace. Biosophical Institute, 1936.