APA-viite (7. p.)
Liapis, P. S. (2007). Preferential trade agreements: How much do they benefit developing economies? OECD.
Chicago-viite (17. p.)
Liapis, Peter S. Preferential Trade Agreements: How Much Do They Benefit Developing Economies? Paris, France: OECD, 2007.
MLA-viite (9. p.)
Liapis, Peter S. Preferential Trade Agreements: How Much Do They Benefit Developing Economies? OECD, 2007.
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