APA-čujuhus (7. p.)
Skipper, H. D., & Barfield, C. E. (2001). Insurance in the General Agreement on Trade in Services. AEI Press.
Chicago-čujuhus (17. p.)
Skipper, Harold D., juo Claude E. Barfield. Insurance in the General Agreement on Trade in Services. Washington: AEI Press, 2001.
MLA-čujuhus (9. p.)
Skipper, Harold D., juo Claude E. Barfield. Insurance in the General Agreement on Trade in Services. AEI Press, 2001.
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