APA (7th ed.) Citation

O'Brien, G. (1929). Agricultural Economics By George O'Brien. Longmans, Green and Co.

Chicago Style (17th ed.) Citation

O'Brien, George. Agricultural Economics By George O'Brien. London - New York - Toronto: Longmans, Green and Co, 1929.

MLA (9th ed.) Citation

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

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