Cita APA (7th ed.)

Avicenne, P. (1972). Bibliographical services throught the: World. Unesco.

Cita Chicago (17th ed.)

Avicenne, Paul. Bibliographical Services Throught the: World. Paris: Unesco, 1972.

Cita MLA (9th ed.)

Avicenne, Paul. Bibliographical Services Throught the: World. Unesco, 1972.