Cita APA

United States. Departament of State. (1981). Countries of the word and their leaders year-book 19--. Michigan: Gale Research.

Citación estilo Chicago

United States. Departament of State. Countries of the Word and Their Leaders Year-book 19--. Michigan: Gale Research, 1981.

Cita MLA

United States. Departament of State. Countries of the Word and Their Leaders Year-book 19--. Michigan: Gale Research, 1981.