APA (7th ed.) Citation

O'Brien, T. (1997). Factory farming and human health: A Compassion in World Farming Trust. Compassion in World Farming Trust.

Chicago Style (17th ed.) Citation

O'Brien, Tim. Factory Farming and Human Health: A Compassion in World Farming Trust. Petersfield, Hampshire: Compassion in World Farming Trust, 1997.

MLA (9th ed.) Citation

O'Brien, Tim. Factory Farming and Human Health: A Compassion in World Farming Trust. Compassion in World Farming Trust, 1997.