APA (7th ed.) Citation

Political Risk Services (IBC USA (Publications) Inc.). (1991). Political risk yearbook. Political Risk Services.

Chicago Style (17th ed.) Citation

Political Risk Services (IBC USA (Publications) Inc.). Political Risk Yearbook. Syracuse, N.Y.: Political Risk Services, 1991.

MLA (9th ed.) Citation

Political Risk Services (IBC USA (Publications) Inc.). Political Risk Yearbook. Political Risk Services, 1991.

Warning: These citations may not always be 100% accurate.