Cita APA (7a ed.)

Day, C. (1925). History of commerce of the United States. Longmans, Green and Co..

Cita Chicago Style (17a ed.)

Day, Clive. History of Commerce of the United States. New York [etc.]: Longmans, Green and Co., 1925.

Cita MLA (8a ed.)

Day, Clive. History of Commerce of the United States. Longmans, Green and Co., 1925.