APA (7th ed.) Zitazioa

(1977). Political handbook of the world : 1977: Government, regional issues, and intergovernmental organizations as of January 1, 1977. McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

Political Handbook of the World : 1977: Government, Regional Issues, and Intergovernmental Organizations as of January 1, 1977. New York: McGraw-Hill, 1977.

MLA (9th ed.) Zitazioa

Political Handbook of the World : 1977: Government, Regional Issues, and Intergovernmental Organizations as of January 1, 1977. McGraw-Hill, 1977.