APA (7th ed.) Citation

O'Brien, G. (1929). Agricultural economics. Longmans, Green and co..

Chicago Style (17th ed.) Citation

O'Brien, George. Agricultural Economics. London, New York [etc.]: Longmans, Green and co., 1929.

MLA (9th ed.) Citation

O'Brien, George. Agricultural Economics. Longmans, Green and co., 1929.

Warning: These citations may not always be 100% accurate.