Cita APA (7a ed.)

Collison, R. L. (1963). Bibliographical services throughout the world: 1950-59. UNESCO.

Cita Chicago Style (17a ed.)

Collison, Robert L. Bibliographical Services Throughout the World: 1950-59. Paris: UNESCO, 1963.

Cita MLA (9a ed.)

Collison, Robert L. Bibliographical Services Throughout the World: 1950-59. UNESCO, 1963.