Byers, A. (2008). Value-adding standards in the North American food market: Trade opportunities in certified products for developing countries. Rome: Food and Agriculture Oranization of the United Nations.

Byers, Alice. Value-adding Standards in the North American Food Market: Trade Opportunities in Certified Products for Developing Countries. Rome: Food and Agriculture Oranization of the United Nations, 2008.

Byers, Alice. Value-adding Standards in the North American Food Market: Trade Opportunities in Certified Products for Developing Countries. Rome: Food and Agriculture Oranization of the United Nations, 2008.