APA-ийн эшлэл(7 дахь хэвлэлт)

Byers, A., & Liu, P. (2008). Value-adding standards in the North American food market: Trade opportunities in certified products for developing countries.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Byers, Alice, ба Pascal Liu. Value-adding Standards in the North American Food Market: Trade Opportunities in Certified Products for Developing Countries. 2008.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Byers, Alice, ба Pascal Liu. Value-adding Standards in the North American Food Market: Trade Opportunities in Certified Products for Developing Countries. 2008.