Kol, J. (1995). Bloc Formation, Fragmentation and Stability in the World Economy. WRR.
Chicago Style (17th ed.) ZitazioaKol, J. Bloc Formation, Fragmentation and Stability in the World Economy. WRR, 1995.
MLA (9th ed.) ZitazioaKol, J. Bloc Formation, Fragmentation and Stability in the World Economy. WRR, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.