Cita APA (7a ed.)

(1965). The World Book Encyclopedia U - V: Volume 19. Field Enterprises Educational Corporation.

Cita Chicago Style (17a ed.)

The World Book Encyclopedia U - V: Volume 19. Chicago, Estados Unidos: Field Enterprises Educational Corporation, 1965.

Cita MLA (9a ed.)

The World Book Encyclopedia U - V: Volume 19. Field Enterprises Educational Corporation, 1965.