Cita APA (7th ed.)

(1972). Bibliographical services throught the World 1965-69. Unesco.

Cita Chicago (17th ed.)

Bibliographical Services Throught the World 1965-69. Paris: Unesco, 1972.

Cita MLA (9th ed.)

Bibliographical Services Throught the World 1965-69. Unesco, 1972.